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Clinical Updates
January
CBD Cream for Pain?
January 02, 2020
People suffering peripheral neuropathy in their legs and feet applied CBD cream or placebo for one month. Did it help? Find out in the Topical CBD section of our CBD Review. Also see our Top Picks among creams, oils, and other CBD products.
Curcumin for Blood Sugar Control?
January 03, 2020
Preliminary research suggests that curcumin (from turmeric) taken with meals can reduce the increases in blood sugar and insulin levels that occur after eating. But does curcumin help people with pre-existing type 2 diabetes? See what a recent study found in the What It Does section of the Turmeric and Curcumin Supplements & Spices Review. Also see our Top Picks among turmeric and curcumin products.
Foods That May Help Sleep
January 03, 2020
In addition to supplements like melatonin that can aid sleep, certain foods are associated with reduced risk of insomnia. We've added information about this to our answer to the question: Which supplements can help me sleep?
When to Eat Protein
January 06, 2020
The timing of protein intake during the day was associated with greater reductions in abdominal fat and BMI (body mass index) among people engaged in exercise programs in a recent study. The timing of protein intake can also improve the likelihood of muscular benefits. For details, see the When to Take section of the Protein Powders and Drinks Review. Also see our Top Picks among protein products.
Eggshell Membrane for Hair, Skin, Nails?
January 06, 2020
Does supplementing with eggshell membrane (which contains collagen and elastin) improve hair, skin, or nails? See what a recent study found in the What It Does section of the Collagen Supplements Review. Also see our Top Picks among collagen supplements.
Tart Cherry for Gout?
January 06, 2020
A clinical trial checked whether or not tart cherry would reduce the number of flare-ups in people with gout. Find out if it helped in our answer to the question: What are the health benefits of tart cherry juice?
Zinc and Folate for Infertility?
January 06, 2020
Did supplementing with zinc and folate improve semen quality and fertility for men in a recent study? Find out in the What It Does section of the Zinc Supplements Review. Also see our Top Picks among zinc supplements.
Risk With Supplements During Chemotherapy
January 10, 2020
The risk of cancer recurrence and risk of death were shown to be higher when certain supplements were used by women being treated for breast cancer, according to a recent study. We’ve add details about this to our answer to the question: Do any supplements reduce side of effects of chemotherapy?
Concern With Ashwagandha
January 11, 2020
Ashwagandha can increase thyroid hormone levels, resulting in thyroid toxicity, even in people without a history of thyroid disease. Read about a recent case and learn symptoms to look for in the Concerns and Cautions section of the Ashwagandha Supplements Review. Also see our Top Pick among ashwagandha supplements.
Collagen vs. Whey for Muscle
January 11, 2020
Does taking collagen protein increase muscle as well as whey protein? Find out what a recent study showed in the "Building Muscle" sections of both the Protein Powders Review and the Collagen Supplements Review. Also see our Top Picks for protein powders and Top Picks for collagen.
Vitamin D & Bone Density
January 13, 2020
Does taking vitamin D improve bone mineral density in older men and women who are not deficient in vitamin D? See what a major study found in the Bones and fractures section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
Tea & Heart Disease
January 13, 2020
Another study shows that people who drink tea are less likely to suffer from cardiovascular disease. Find out how much and what type of tea was associated with benefits in the Cardiovascular disease section of the Green Tea Review. Also see our Top Picks for green tea.
Magnesium for Leg Cramps?
January 13, 2020
Magnesium if often touted for treating leg cramps. Does it really work? See what studies have shown, including a recent study among pregnant women, in the What It Does section of the Magnesium Supplements Review. Also see our Top Picks for magnesium.
Fish Oils Not Equal on Cardio Benefit
January 17, 2020
High-dose, highly-concentrated fish oil is known to lower triglycerides in people with elevated levels. One prescription product was even shown to lower the risk of cardiovascular events in such people. However, a clinical trial of another fish oil was recently stopped due to its low likelihood of providing this benefit. Learn how these products differ and how fish oil supplements compare to them in the Prescription Fish Oil vs. Supplements section of the Fish Oil Review. Also see our Top Picks for fish oil and other marine omega-3 supplements.
PQQ for Athletic Endurance?
January 17, 2020
We've added information from a recent study of PQQ for athletic endurance to our answer to the question: What is PQQ? Does it help with aging and memory? Is it similar to CoQ10?
Fish Oil & Fertility
January 20, 2020
Is there a relationship between taking fish oil and sperm count? See what a recent study in men found in the What It Does section of the Fish Oil Review. Also see our Top Picks for fish oil.
Coconut Oil Impact on Cholesterol
January 20, 2020
Coconut oil can significantly affect cholesterol levels according to a new report. Get the details in the Concerns and Cautions section of the Coconut & MCT Oils Review. Also see our Top Picks for coconut and MCT oils.
Best Way to Cook With Olive Oil
January 24, 2020
Cooking can reduce levels of heart-healthy polyphenols in extra virgin olive oil (EVOO), but a new study showed how to minimize this loss. Get the details in the ConsumerTips section of the Extra Virgin Olive Oil Review. Also see our Top Picks among extra virgin olive oils.
Stevia vs. Sugar for Hunger Suppression
January 24, 2020
How does the non-caloric sweetener stevia compare to sugar in suppressing hunger before a meal? Find out in our updated answer to the question: What are the health benefits of stevia? Is it safe?
When Magnesium Doesn't Seem to Help
January 27, 2020
Getting the recommended amount of magnesium has been associated with bone benefits. However, there was an increased risk of hip fracture among people who used a particular form of magnesium, according to a recent analysis. Get the details in the What It Does section of the Magnesium Supplements Review. Also see our Top Pick for magnesium.
How to Use Zinc Lozenges for Colds
January 27, 2020
Zinc lozenges have been shown to reduce cold symptoms, but effectiveness appears to depend on the lozenge formulation and how it is used. Learn more in the What It Does section of the Zinc Supplements and Lozenges Review. Also see our Top Picks for zinc lozenges and pills.
Is Melatonin Safe for Children?
January 27, 2020
Find out what side effects melatonin had when taken for up to two years by children and adolescents in a small study. See the What It Does section of the Melatonin Supplements Review. Also see our Top Pick for melatonin.
Not Enough Vitamin C
January 30, 2020
Vitamin C deficiency is known to cause scurvy, characterized by bleeding gums and other connective tissue problems. But vitamin C deficiency was recently reported to cause a very different array of symptoms in several people. Learn more in the What It Does section of the Vitamin C Supplements Review. Also see our Top Picks for vitamin C.
Collagen for Knees?
January 31, 2020
Collagen supplements have been tested in many studies to reduce pain and/or improve function in osteoarthritic knees. A recent study focused on collagen peptides. Find out if they worked (and see the results for other collagen products) in the Joint Pain section of the Collagen Supplements Review. Also see our Top Picks for collagen supplements for joint pain and for wrinkles.
Pomegranate for Memory?
January 31, 2020
Pomegranate juice and supplements have been promoted for improving cardiovascular health, controlling blood sugar, and inhibiting prostate cancer. Most recently pomegranate juice was tested in a year-long study for its effects on memory. Find out if it helped, and see if it works for other touted uses, in the What It Does section of the Pomegranate Juice and Supplements Review Article.
February
Berberine vs. Colon Cancer?
February 03, 2020
A large study investigated the potential for berberine (promoted for blood sugar control) to prevent precancerous colon polyps. Find out if it worked in the What It Does section of the Berberine & Goldenseal Supplements Review. Also see our Top Pick for berberine.
Problems With Huperzine A
February 03, 2020
A recent analysis of supplements claiming to contain huperzine A (promoted for memory enhancement) found problems with most products. For details see the Concerns and Cautions section of the Huperzine A Supplements Review. Also learn what clinical studies have shown with huperzine A in the What It Does section and see which huperzine A supplements have been Approved by CL.
Avoid Quality Problems With Fish Oil
February 06, 2020
Nearly half of 17 popular fish oil supplements tested in a recently published study did not meet at least one of the quality criteria for freshness or content. Interestingly, two that passed testing were Approved by ConsumerLab, but none that failed were CL Approved. For details, see the Quality Concerns section of the Fish Oil Supplements Review. Also see our Top Picks for fish and marine oils.
Red Yeast Rice and Diabetes?
February 07, 2020
The use of statin drugs, like lovastatin (Mevacor) is associated with an increase in the risk of developing diabetes. But does red yeast rice carry the same risk? See what a large study found in the Concerns and Cautions section of the Red Yeast Rice Review. Also see our Top Pick for red yeast rice.
Glucosamine and Blood Sugar
February 07, 2020
Glucosamine (used to treat osteoarthritis) is a type of sugar, so does its daily use affect blood sugar levels and one's risk of developing diabetes? Find out in the Concerns and Cautions section of the Joint Health Review. Also see our Top Picks for Glucosamine, Chondroitin, MSM, and Boswellia supplements.
Vitamin D for Hives
February 07, 2020
If you suffer from chronic hives (or chronic urticaria) and are deficient in vitamin D, taking vitamin D may be helpful, according to a new study. (Vitamin D may also be helpful for other skin conditions such as eczema and psoriasis.) Get the details in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
Vitamin B12 and Risk of Death
February 10, 2020
Vinegar Makes Grilling Safer
February 10, 2020
Grilling food can create cancer-causing compounds, but a study shows that vinegar can help. Find out how in the What to Consider When Using section of the Apple Cider Vinegar Review. Also see our Top Picks for apple cider vinegar.
Fish Oil for Diabetes?
February 10, 2020
There is mixed evidence as to whether fish oil helps people who have diabetes. Get the details, including those of a new study, in the What It Does section of the Fish Oil Supplements Review. Also see our Top Picks for fish oil.
Vitamin C & Lungs
February 10, 2020
Supplementing with vitamin C to correct deficiency can reverse a form of lung disease, as exemplified in a recent report. For details, see the What It Does section of the Vitamin C Supplements Review. Also see our Top Picks for vitamin C.
Collagen for Sun Damaged Skin?
February 14, 2020
A study suggests that fish-derived collagen can improve sun-damaged skin. For details, including dosage, see the What It Does section of the Collagen Supplements Review. Also see our Top Picks for collagen.
Cocoa for Artery Disease?
February 14, 2020
People with peripheral artery disease often have trouble walking. Can flavanol-rich cocoa help? Find out what a recent study showed in the What It Does section of the Cocoa and Dark Chocolates Review. Also see our Top Picks for cocoas, chocolates, chips, nibs, and cocoa supplements.
Help for Substance Abuse?
February 14, 2020
There is preliminary evidence that high-dose CBD may help people with substance abuse disorder. For details, see the What It Does section of the Review. Also see our Top Picks among products.
Saffron for Better Sleep?
February 17, 2020
A recent, preliminary study suggests that saffron may help with sleep. Get the details plus information about other supplements that may help or interfere with sleep, in our answer to the question: Which supplements can help me sleep?
Vitamin K for Bone Density?
February 17, 2020
Vitamin K (as MK-7) was given daily for one year to older men and women to see if it would improve bone mineral density. Some also received vitamin D and calcium. Find out if it helped, as well as the results of related studies, in the What It Does section of the Vitamin K Supplements Review. Also see our Top Picks among vitamin K supplements.
Does Ashwagandha Lower Stress?
February 24, 2020
A widely available ashwagandha extract was recently tested for its ability to reduce stress, at two different doses. Find out if either worked in the What It Does section of the Ashwagandha Supplements Review. Also see our Top Pick for ashwagandha.
Cognitive Impairment From B12 Deficiency
February 24, 2020
Vitamin B12 deficiency can cause a wide range of symptoms. This includes cognitive impairment, as shown in a recent case. For details about the symptoms of B12 deficiency see the B12 section of the B Vitamin Supplements Review. Also see our Top Picks for B12 and other B vitamin supplements.
Vitamin D for Mom Affects Baby's Bones
February 24, 2020
Taking high-dose versus very-low-dose vitamin D during pregnancy led to greater bone density in offspring, according to a recent study. But, there are important caveats. Get the details in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
How Much Sun for Vitamin D?
February 28, 2020
Is sun exposure to the hands, arms, and legs enough to boost or maintain adequate vitamin D levels? See what a recent study showed in the Getting Vitamin D from Sunlight section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
Breast Cancer & Milk Consumption
February 28, 2020
Is drinking milk – dairy or soy – associated with breast cancer risk? Find out what a new study found in our answer to the following question: Are there vitamins or supplements that can reduce my risk of breast cancer? Do any increase cancer risk?
Biotin May Skew Many Blood Tests
February 28, 2020
If you take a high-dose biotin supplement, be aware of the growing list of blood tests with which it may interfere. See the latest information in the Biotin section of the B Vitamin Supplements Review.
March
Do Glucosamine & Chondroitin Work?
March 02, 2020
After reviewing the clinical literature regarding glucosamine and chondroitin for osteoarthritis, an expert group drew conclusions regarding their efficacy. Find out what they concluded in the What It Does section of the Joint Health Supplements Review. Also see our Top Picks for glucosamine, chondroitin and other joint health supplements.
Fish Oil and Heart Disease
March 06, 2020
Many studies have assessed the potential benefits of taking fish oil supplements. Results have been conflicting, but one of the largest and longest-term studies was recently published. See what it found in the What It Does section of the Fish Oil Supplements Review. Also see our general recommendations for using fish oil for heart health and check out our Top Picks for fish oil supplements.
Olive Oil and Heart Disease
March 06, 2020
Does consuming olive oil instead of butter or margarine reduce the risk of heart disease? Find out what studies are showing, and the amounts of olive oil being used, in the What It Does section of the Olive Oil Review. Also see our Top Picks for olive oil.
Melatonin and Cataracts
March 06, 2020
Do you have cataracts (clouded lenses of the eye)? A recent study suggests that having them removed and replaced with a certain type of intraocular lens may increase natural melatonin production. For details, see the ConsumerTips section of the new Melatonin Supplements Review. Also see our Top Picks among melatonin supplements.
Does CoQ10 Help With Statins?
March 09, 2020
Many studies have looked at whether or not CoQ10 helps people with statin-associated muscle pain. Read the latest in the What It Does section of the CoQ10 and Ubiquinol Supplements Review. Also see our Top Picks for CoQ10 and ubiquinol supplements.
Staying Safe With Green Tea
March 09, 2020
If you use a green tea extract (alone or as part of a supplement formula), it is important to take it with food according to several reports, as explained in the Concerns and Cautions section of the Green Tea Review. Also see our Top Picks for green tea in bags, loose, as matcha powder, and in other forms.
How Long Does Coronavirus Last On Surfaces?
March 16, 2020
We've added new information about how long the coronavirus might last on packaging, and how this varies greatly depending on the package material, in our answer to the question: Can I get the new coronavirus (2019-nCoV) from supplements from China?
EPA vs. DHA from Fish Oil
March 17, 2020
Some marine-based oils are higher in either EPA or DHA — key omega-3 fatty acids -- but does it matter? See what a recent study found in the What to Consider When Buying section of the Fish and Marine Oil Supplements Review. Also see our Top Picks among fish and marine oils.
CoQ10 Bioavailability
March 20, 2020
CoQ10 is not well absorbed unless taken with fats or oils, such as with a meal. Bioavailability-enhanced formulations allow CoQ10 to be taken without a meal, but how good are they? We've added new information about one such formula and how it compares to taking regular CoQ10 in the Absorption and Bioavailability Enhancers section of the CoQ10 and Ubiquinol Supplements Review. Also see our Top Picks for CoQ10 and ubiquinol.
When to Eat Protein
March 20, 2020
Some evidence indicates that it is best to distribute protein across meals throughout the day to maximize protein production in muscle. A recent study suggests that there is one meal when protein intake could be higher for nearly everyone, and there is another meal when older people particularly fall short. For details see the When to Take section of the Protein Powder and Drinks Review. Also see our Top Picks for protein powders and drinks.
Another Case of Liver Injury With Turmeric
March 24, 2020
Although believed to be rare, we’ve been reporting a steady stream of cases of liver injury (hepatitis) with turmeric supplements. Learn the symptoms and read the latest in the Concerns and Cautions section of the Turmeric and Curcumin Supplements Review.
Surprising Role of Potassium in COVID-19
March 24, 2020
New research out of China suggests that many patients hospitalized with COVID-19 are low in potassium. For details see the information about Potassium in our answer to the question: What are natural remedies for coronavirus (COVID-19)? Do supplements like zinc, vitamin C, or herbals work?
Collagen for the Skin
March 27, 2020
Supplementing with collagen to improve aging skin is popular, but does it work? The latest study with collagen used a higher dose than other studies, but is a higher dose better? Find out in the What It Does section of the Collagen Supplements Review. Also see our Top Picks for collagen for wrinkles and for osteoarthritis.
Is Quercetin Safe?
March 30, 2020
Quercetin has been proposed as a treatment for a range of medical conditions, including COVID-19, but is it safe? Find out what studies have found, including results of a recent, small clinical trial, in the Concerns and Cautions section of the Quercetin Supplements Review. Also see our Top Picks for quercetin.
Chia for Obesity?
March 30, 2020
Chia seeds are highly nutritious and rich in fiber, but can they help with weight management? Find out what studies are showing, including a recent clinical trial among obese children, in the What It Does section of the Chia Seed Review. Also see our Top Picks for chia seed products.
April
Dark Chocolate for Memory?
April 04, 2020
Studies show that chocolate high in flavanols can improve cognition in people with cognitive decline. Can it also boost memory in people who are cognitively healthy? Find out in the Memory section of the Dark Chocolate and Cocoa Powders Review. Also see our Top Picks for dark chocolates and cocoa powders.
Coconut Oil and Cholesterol
April 10, 2020
Coconut oil is known to raise levels of LDL ("bad") cholesterol but also increase levels of HDL ("good") cholesterol. Is one more important than the other? Find out the latest information in the Cautions and Concerns section of the Coconut Oil and MCT Oil Review. Also see our Top Picks for coconut and MCT oils.
Resveratrol for Memory?
April 10, 2020
A new study evaluated the effects of resveratrol on cognitive functioning in postmenopausal women. Find out if it helped in the What It Does section of the Resveratrol Supplements Review. Also see our Top Picks for resveratrol.
A Food to Slow Cognitive Decline?
April 13, 2020
Adherence to a Mediterranean diet was associated with a lower risk of cognitive impairment in a major new study, but only one food within that diet -- fish -- was also linked to slower loss of cognitive function. Find out how many servings of fish had the greatest impact in the What It Does section of the Fish Oil Supplements Review. Also see if fish oil supplements help and see our Top Picks for fish oil.
Also see our Top Picks for canned tuna and salmon.
Also see our Top Picks for canned tuna and salmon.
Zinc Concern
April 13, 2020
Zinc is a popular supplement right now due to COVID-19, but be aware that taking large doses of zinc for a long period of time can suppress the immune system by causing or exacerbating copper deficiency. Certain people may be more at risk for this. Get the details in the Cautions and Concerns section of the Zinc Supplements and Lozenges Review.
Curcumin, Insulin & Alzheimer's?
April 17, 2020
Curcumin (from turmeric) may provide a modest benefit in people with insulin resistance and a new study suggests this may also reduce biomarkers of Alzheimer's disease. For details, see the What It Does section of the Turmeric and Curcumin Supplements and Spices Review. Also see our Top Picks for curcumin.
Magnesium Can Boost Cognition
April 18, 2020
A clinical study has shown that cognitive function can be improved by as much as 9% in some people just by supplementing with magnesium. Get the details and find out if magnesium might help you in the What It Does section of the Magnesium Supplements Review. Also see our Top Picks for magnesium.
Does Protein Powder Affect Blood Flow?
April 20, 2020
Does supplementing with whey protein isolate affect blood flow through the aorta and to the brain? Find out what a recent study found in the What It Does section of the Protein Powders & Drinks Review. Also learn what effects protein powder has on building and maintaining muscle and see our Top Picks for protein powders.
Melatonin During Chemotherapy?
April 21, 2020
Does melatonin improve sleep quality and have other benefits during chemotherapy for breast cancer? Find out what a recent study showed in the What It Does section of the Melatonin Supplements Review. Also see our Top Picks for melatonin.
Early Sign of Thiamin Deficiency
April 27, 2020
Thiamin (vitamin B1) deficiency can cause lasting neurologic damage and affect heart function. It can occur with poor nutrition and as a result of taking certain diuretics. A recent case highlighted an early sign of thiamin deficiency that involves the eyes. We've added this information to the Thiamin section of the B Vitamin Supplements Review. Also see our Top Pick for thiamin and B complexes that contain thiamin. You can also get thiamin from a good multivitamin.
A Role for Vitamin K in COVID-19?
April 27, 2020
A new study showed a link between vitamin K and the development of COVID-19. Learn what this means in the What It Does section of our Vitamin K Supplements Review. Also see our Top Pick among vitamin K supplements.
Alpha Lipoic Acid and Reflux
April 29, 2020
A CL member reported experiencing acid reflux when using alpha lipoic acid. This effect has been reported in clinical studies with higher doses -- which is not surprising consider that alpha lipoic acid is, after all, an acid. Ways to avoid this issue are discussed in the Concerns and Cautions section of the Alpha Lipoic Acid Supplements Review. Also see our Top Picks for alpha lipoic acid.
May
Can Garlic Slow Atherosclerosis?
May 01, 2020
Can taking a garlic supplement slow the build-up of plaque in arteries? See what a new study found in the What It Does section of the Garlic Supplements Review. Also see our top choices for garlic supplements.
Does Fish Oil or Curcumin Increase Brain Blood Flow?
May 01, 2020
A study among people ages 50 to 80 evaluated the effects of fish oil and curcumin on blood flow to the brain and on other aspects of cardiovascular function. See the results in the "What It Does" section of the Fish Oil Supplements Review and the Curcumin Supplements Review. Also see our Top Picks for fish oil and curcumin.
Does Too Much Vitamin D Hurt Muscle?
May 04, 2020
A study among women given moderately high doses of vitamin D found that they lost strength. Further analysis of the data suggests why. Get the details in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
CBD for Osteoarthritis Pain
May 04, 2020
A recent study, conducted in dogs, showed promise for CBD in reducing pain and inflammation due to osteoarthritis (pain due to worn joints). See the details in the What It Does section of the CBD and Hemp Extracts Review. Also see our Top Picks for CBD for people and for pets.
Low-Cal Orange Juice For Kidney Stones?
May 11, 2020
Increasing citrate intake may reduce the risk of kidney stones. Find out how effective low-cal orange juice is at increasing citrate in our answer to the question: Can lemon juice, lemonade, or other juices reduce my chances of getting kidney stones?
High Blood Pressure Risk With Too Much Folic Acid During Pregnancy
May 14, 2020
While it is important to take folate during pregnancy, a new study suggests that too much folic acid from supplements increases the risk of high blood pressure in mothers. See the details in the Folic Acid section of the B Vitamin Supplements Review.
Also see our Top Pick among prenatal vitamins, which provides adequate (but not too much) folic acid, in our Multivitamin and Multiminerals Supplements Review.
Also see our Top Pick among prenatal vitamins, which provides adequate (but not too much) folic acid, in our Multivitamin and Multiminerals Supplements Review.
"Whole Grain" Is Not Enough
May 18, 2020
Potassium Levels Decline
May 18, 2020
An analysis of blood samples of thousands of Americans suggests a slight decline in potassium intake. Find out what may be causing this in the update to the What It Does section of the Potassium Supplements Review. Also see our Top Picks for potassium supplements.
Generic Fish Oil Approved
May 22, 2020
The first generic version of icosapent ethyl (Vascepa) was recently approved by the FDA. But don't expect it on the market soon. See the details in the prescription omega-3s section of the Fish Oil Supplements Review, which includes comparisons with fish oil supplements. Also see our Top Picks for fish oils, including highly concentrated versions.
CBD Label Inaccuracies
May 22, 2020
Tests of CBD products purchased at local stores showed that many provided much less CBD than claimed. Get the details in the Products on the Market section of the CBD and Hemp Extracts Review. Also see our Top Picks for CBD products.
Lower Risk of Dementia Through Foods
May 25, 2020
A 20-year study showed that the risk of Alzheimer's disease and other forms of dementia was 76% lower in people who ate more of certain foods. Find out what they ate and learn if supplements can help in our answer to the question: Do any supplements really help with brain function, like memory and cognition?
Ashwagandha for Better Sleep?
May 26, 2020
Ashwagandha, which is often used for anxiety and stress, was recently tested in people with insomnia. Did it help them fall asleep? Find out in the What It Does section of the Ashwagandha Supplements Review. Also see our Top Pick for ashwagandha.
Probiotic to Reduce Tooth Staining
May 28, 2020
A probiotic was tested to see if it could reduce the occurrence of black stains (a type of dental plaque) on teeth. Find out if it worked in the What It Does section of the Probiotic Supplements Review. Also see our Top Picks among probiotics.
Is CBD Safe?
May 29, 2020
Find out the most common adverse events reported for a popular line of CBD products in the Concerns and Cautions section of the CBD Oils and Hemp Extracts Review. Also see our Top Picks among products.
Cranberry for Cystitis in Men?
May 29, 2020
Cystitis (inflammation of the bladder) is common in men undergoing radiation therapy for prostate cancer. A study evaluated whether a cranberry supplement could reduce the incidence of cystitis in these men. Find out if it helped in our updated answer to the question: Are cranberry supplements helpful for men? Can they help with symptoms of prostatitis or urinary tract infections?
June
Vitamin D for COVID-19 Patients
June 01, 2020
A study evaluated the effects of giving vitamin D, magnesium, and vitamin B12 to COVID-19 patients. See the results in the COVID-19 section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
Ubiquinol for Fatigue?
June 01, 2020
Does taking ubiquinol (the active form of CoQ10) help men and women who are experiencing fatigue in daily life? Find out what a recent study showed in the What It Does section of the CoQ10 and Ubiquinol Supplements Review. Also see our Top Picks for CoQ10 and ubiquinol.
Melatonin for Sleep and Parkinson's
June 05, 2020
Melatonin is known to trigger sleep, but can it help people with Parkinson’s disease? See the results of the latest study in the What It Does section of the Melatonin Supplements Review. Also see our Top Picks for melatonin.
Probiotics That Do or Don't Work
June 08, 2020
An expert panel of gastroenterologists reviewed the clinical evidence for probiotics in preventing or treating C. difficile infection, IBS, ulcerative colitis, Crohn's disease, pouchitis, and necrotizing enterocolitis. Find out for which conditions they recommend probiotics and for which they don't in the What They Do section of the Probiotic Supplements Review (we've highlighted their recommendations in yellow). Also see our Top Picks for probiotics.
A Role for Calcium in COVID-19?
June 08, 2020
A preliminary study suggests a possible role for calcium supplementation in treating COVID-19. See the details in the COVID-19 section of the Calcium Supplements Review. Also see our Top Picks among calcium supplements.
Vitamin D and COVID-19 Risk
June 12, 2020
Vitamin D deficiency was associated with an increased risk of testing positive for coronavirus according to a recent study. For details see the COVID-19 section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
Do Zinc Lozenges Help?
June 13, 2020
Several individuals diagnosed with COVID-19 began using zinc lozenges after they became sick. Find out if this was reported to help or not in the COVID-19 section of the Zinc Supplements Review. Also see our Top Picks for zinc supplements and lozenges.
Benefit of Eating Fish
June 13, 2020
Increasing intake of omega-3 fatty acids through greater fish intake was shown to provide some cognitive improvements to children according to a recent study. For details, see the What It Does section of the Fish Oil Supplements Review. Also see our Top Picks for fish oil and Top Picks for canned tuna and salmon (good sources of omega-3s).
Whey vs. Casein vs. Neither
June 16, 2020
A study among elderly men engaged in strength training compared the effects of supplementing with whey protein, casein protein, or neither. Learn what the study showed in the What It Does section of the Protein Powders Review. Also see our Top Picks among protein powders.
Most Avocado Oils Fail Tests of Quality and Purity
June 19, 2020
The vast majority of avocado oils purchased in the U.S. were found to be stale or contain other oils, such as soybean oil, in a study by academic researchers. Get the details, along with the names of oils that passed testing, in the Quality Concerns section of our avocado oil article.
Low Potassium in COVID-19 Patients
June 19, 2020
Patients hospitalized with COVID-19 have often been found to have low potassium levels. Should you be concerned? Learn more in the COVID-19 section of the Potassium Supplements Review. Also see our Top Picks among potassium supplements.
Fish Oil for Improved Insulin Sensitivity?
June 22, 2020
Fish oil was given for three months to people with decreased sensitivity to insulin. Did it improve insulin sensitivity? Find out in the What It Does section of the Fish Oil Supplements Review. Also see our Top Picks among fish oil supplements.
Does Vitamin D Harden Arteries?
June 23, 2020
Vitamin D regulates calcium levels in the body but does taking high-dose vitamin D lead to arterial calcifications (hardening of the arteries)? Find out what a 3-year study showed in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks among vitamin D supplements.
Signs of Too Much Vitamin D
June 26, 2020
Doctors were surprised to discover that symptoms exhibited by a 64-year old woman were due to very high levels of vitamin D from supplements. Learn about the symptoms of too much vitamin D in the Concerns and Cautions section of the Vitamin D Supplements Review. Also see our Top Picks among vitamin D supplements and learn How Much Is Too Much vitamin D.
Fish Collagen Allergy
June 26, 2020
Be aware that some people may be allergic to fish collagen even if they don't respond to common fish allergy tests, according to a recent study. Get the details in the Concerns and Cautions section of the Collagen Supplements Review. Also see our Top Picks for collagen supplements for skin and for joints.
Factors For Lower Risk of Dementia
June 26, 2020
Diet and lifestyle factors were associated with up to 60% reductions in the risk of developing Alzheimer dementia according to a new study. Learn about these lifestyle factors in the updated answer to the question: Do any supplements really help with brain function, like memory and cognition?
Getting the Most from Green Tea
June 29, 2020
Our Green Tea Review shows that matcha green tea provides higher amounts of healthful catechins than regular green tea. This week, we added information about why this is as well as the results of a new study showing which type of matcha provides the highest levels of polyphenols (i.e., catechins). For details see the What to Consider When Buying section of the review. Also see our Top Picks among green tea products.
CBD for Sleep?
June 29, 2020
The ability of CBD to improve sleep may depend on the dose given and whether there are underlying conditions causing a sleep problem. See the results of the latest study and learn more in the What It Does section of the CBD and Hemp Extracts Review. Also see our Top Picks for CBD.
July
Lycopene for Wrinkles?
July 02, 2020
A recent study tested the effects of lycopene supplementation on wrinkles around the eyes ("crow's feet") in older women. Find out if it helped in the What It Does section of the Lycopene Supplements Review. Also see our Top Pick among lycopene supplements.
Vitamin D & Coronavirus
July 03, 2020
Studies are linking low blood levels of vitamin D to higher risk of testing positive for the coronavirus and/or developing more severe disease. Find out what blood levels appear to be protective, as well as the results of the most recent study, in the COVID-19 section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
Caution with Plant-Based Milks for Children
July 06, 2020
Substituting plant-based milks for milk or infant formula can be dangerous to children when the nutritional content is inadequate. For details, see the Concerns and Cautions section of the Plant-Based Milks Review. Also see how products compare nutritionally and our Top Picks among plant-based milks.
Vitamin D and COVID Severity
July 07, 2020
Vitamin D & Osteoarthritis
July 07, 2020
Vitamin D may, in certain situations, reduce knee pain and improve function in people with knee osteoarthritis (due to worn cartilage). Vitamin D may also reduce foot pain associated with knee osteoarthritis, according to a recently published study. For details, see the Osteoarthritis section of the Vitamin D Supplements Review. Also see our Top Picks among vitamin D supplements.
Coconut Oil for Lowering Weight and Cholesterol?
July 13, 2020
Can adding coconut oil to dinner lower weight and/or lower cholesterol levels? See what a new study found in the What It Does section of the Coconut and MCT Oils Review. Also see our Top Picks among coconut oils and MCT oils.
Precaution When Taking Iron
July 13, 2020
Supplementing with iron can cause constipation and even bowel obstruction. Find how to reduce these risks when taking iron in the ConsumerTips section of the Iron Supplements Review. Also see our Top Picks for iron.
Selenium & COVID-19
July 17, 2020
Selenium-deficient people were more likely to die from COVID-19 than those who were not deficient according to a recent study. For details, see the What It Does section of the Selenium Supplements Review. Also see our Top Pick for selenium.
Vitamin D and Risk of Death
July 17, 2020
Increasing vitamin D blood levels was associated with a lower risk of death over time in a recently published long-term study, but only up to a certain level. Find out at what vitamin D blood level the benefit ended in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D and be aware of how much is too much vitamin D.
Omega-3s and the Brain
July 20, 2020
To raise levels of DHA and EPA in the brain, large doses are needed according to a recent study. Even larger doses are needed by people with a gene associated with increased risk of Alzheimer's. While the study did not show an effect on people's cognitive scores, it may help explain why some studies with fish oil show little effect. For details, see the What It Does section of the Fish Oil Supplements Review. Also see our Top Picks among fish oils.
Cinnamon for Prediabetes?
July 20, 2020
Does taking a daily cinnamon supplement help control blood sugar in people with pre-diabetes? See the results of a recent study in the What It Does section of the Cinnamon Supplements & Spices Review. Also see our Top Picks among cinnamon supplements and among cinnamon spices.
How Much Vitamin D from Sunshine?
July 27, 2020
Does exposure to midday sun increase already sufficient vitamin D blood levels? Get the surprising answer from a new study in the Getting vitamin D from sunlight section of the Vitamin D Supplements Review. Also see our Top Picks among vitamin D supplements.
Fish Oil for Arthritis?
July 27, 2020
Fish oil has shown modest benefits in rheumatoid arthritis, but can it help with osteoarthritis -- inflammation due to worn joints? Find out what a recently published study showed in the What It Does section of the Fish Oil Supplements Review. Also see our Top Picks for fish oil.
Can Alpha-Lipoic Acid Lower Weight?
July 27, 2020
Alpha-lipoic acid was given to overweight men and women for 24 weeks in a recent study. Find out if it lowered weight and triglyceride levels in the What It Does section of the Alpha Lipoic Acid Supplements Review. Also see our Top Picks for alpha-lipoic acid.
August
Magnesium Helps Vitamin D
August 01, 2020
Magnesium can boost blood levels of an important form of vitamin D, according to a recent study. For details on how much magnesium to take and when, see the Magnesium affects vitamin D levels section of the Vitamin D Supplements Review. To find a good magnesium supplement, see our Top Picks for magnesium.
Ginseng for Liver?
August 01, 2020
Does taking ginseng lower blood markers of liver disfunction? Find out what a recent study showed in the What It Does section of the Ginseng Supplements Review. Also see our Top Picks for ginseng.
Vitamin D and Depression
August 03, 2020
Can taking 2,000 IU of vitamin D daily lower the chance of developing depression? Find out what a major study showed in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks among vitamin D supplements.
Ubiquinol & Heart Surgery
August 03, 2020
Ubiquinol (the active form of CoQ10) can have a beneficial effect on ailing hearts, but can taking it protect the heart around the time of aortic valve replacement? Find out what a recent study showed in the What It Does section of the CoQ10 and Ubiquinol Supplements Review. Also see our Top Picks for Ubiquinol and CoQ10.
Chocolate and Cancer
August 05, 2020
Can eating more chocolate reduce cancer risk? Find out what a recent study showed in the What It Does section of the Dark Chocolates, Cocoa & Cacao Powders, Nibs, and Supplements Review. Also see our Top Picks for dark chocolate, chocolate chips and cocoa powders.
B Vitamins and Fracture Risk
August 05, 2020
High homocysteine levels have been linked with increased fracture risk in older people. Taking B vitamins can lower homocysteine levels, but does it lower fracture risk? Find out what a recent study using folic acid and B12 showed in the What It Does section of the B Vitamin Supplements Review. Also see our Top Picks for B vitamins.
Vitamin D and Vertigo
August 07, 2020
A common form of vertigo has been linked to vitamin D deficiency, but can taking a vitamin D supplement help prevent episodes of vertigo? Find out what a recent study showed in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
Chocolate to Improve Body Composition?
August 10, 2020
Can eating a small amount of chocolate every day help improve body composition? Find out what a recent study showed in the What It Does section of the Dark Chocolates, Cocoa & Cacao Powders, Nibs, and Supplements Review. Also see our Top Picks for dark chocolate, chocolate chips and cocoa powders.
CBD Reduces Cannabis Use
August 10, 2020
CBD can reduce cannabis use, but only when taken at the right dose, according to a recent study. Find out what dose of CBD helped most in the What It Does section of the CBD & Hemp Extract Supplements Review. Also see our Top Picks for CBD.
Milk Thistle for Menopause?
August 13, 2020
Can taking milk thistle relieve hot flashes during menopause? Learn what a new study showed in the What It Does section of the Milk Thistle Supplements Review. Also see our Top Pick among milk thistle supplements. (Also see our Menopause Supplements Review for information and reviews of products containing soy and red clover isoflavones, black cohosh, or progesterone cream.)
Eggshell Membrane + Fish Oil for Joint Pain?
August 13, 2020
Both eggshell membrane and fish oil have been shown to bring modest reduction in joint pain, but does taking these ingredients together have greater benefit? Find out what a new study showed in the What It Does section of the Collagen Supplements Review. Also see our Top Pick among collagen supplements for joints and for skin.
Zinc for Lowering Blood Sugar and Cholesterol?
August 17, 2020
Zinc may help lower blood sugar as well as cholesterol levels, according to a recent analysis, but the dose and duration of zinc supplementation made a big difference. Get the details in the What It Does section of the Zinc Supplements and Lozenges Review. Also see our Top Picks for zinc.
Vitamin D Deficiency & COVID Death Risk
August 17, 2020
Can a Multivitamin Reduce Colds and Flu?
August 20, 2020
Can regularly taking a multivitamin reduce the chance of getting a cold or flu, or lessen the symptoms and duration of illness among older people? Find out what a recent study showed in the What They Do section of the Multivitamin and Multimineral Supplements Review. Also see our Top Picks among multivitamins for women, men, seniors, children and pets.
Caution With Melatonin & Diabetes
August 20, 2020
Research is raising concern regarding the use of melatonin by people with diabetes. For more details – as well as other concerns with melatonin – see the Concerns and Cautions section of the Melatonin Supplements Review. Also see our Top Picks for Melatonin.
Ashwagandha for Sleep
August 20, 2020
Can ashwagandha help people with insomnia fall asleep and stay asleep longer? Find out what studies are showing in the What It Does section of the Ashwagandha Supplements Review. Also see our Top Picks for ashwagandha.
Beetroot for High Blood Pressure?
August 20, 2020
Beetroot juice can lower blood pressure – but by how much? Learn what a recent study showed in our updated answer to the question: Can beetroot juice or supplements help lower my blood pressure?
Calcium & Artery Calcification
August 24, 2020
Is there an increased risk of coronary artery calcification with the use of calcium supplements? Find out what a recent analysis showed in the Heart Attack and Stroke Risk section of the Calcium Supplements Review. Plus, learn how much calcium one needs per day and how much, if any, can come from supplements. Also see our Top Picks for calcium.
B-12 Supplements vs. Injections
August 24, 2020
Can taking a B-12 supplement work as well as an injection to correct vitamin B-12 deficiency? See what a new study found in the B-12 section of the B Vitamin Supplements Review. Also see our Top Picks for vitamin B-12 and other B vitamin supplements.
Vitamin K & Heart Health
August 25, 2020
Can taking vitamin K supplements improve vascular stiffness or lower blood pressure in people with kidney disease? Find out what a recent study showed in the What It Does section of our Vitamin K Supplements Review. Also see our Top Picks for vitamin K.
Is Expired Green Tea Safe?
August 26, 2020
We were asked if it is safe to use green tea past its "best by" date and if its flavor or health benefits would be diminished. See our answer in the How to Use section of our Green Tea Review. Also see our Top Picks for green tea — including tea bags, loose tea, matcha, and green tea supplements.
Concern Over Memory Supplement Quality
August 27, 2020
Many supplements with phosphatidylserine – promoted for memory enhancement -- do not contain their listed amounts of this ingredient, according to a new report. Get details and learn what clinical studies show with phosphatidylserine in our updated answer to the question: Do either phosphatidylserine or phosphatidylcholine help with memory and cognition?
Acetyl-L-carnitine + Alpha-Lipoic Acid for Lowering Blood Pressure?
August 27, 2020
We were recently asked if taking a combination of acetyl-L-carnitine and alpha-lipoic acid can help lower blood pressure. Find out what research shows in the What It Does section of the Acetyl-L-Carnitine Supplements Review. Also see our answer to the question: Which supplements can help to lower blood pressure?
Honey for Coughs and Colds?
August 27, 2020
Does honey help reduce cold symptoms and improve coughs? Find out what a recent analysis concluded in our updated answer to the question: Do any supplements help prevent or treat a cold?
Vitamin D for Asthma?
August 28, 2020
Does giving high-dose vitamin D to children with asthma reduce their need for inhaled steroids or allow them to go longer between attacks? Find out what a recent study showed in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
Melatonin for Nightshift Workers?
August 28, 2020
Does using melatonin before going to sleep in the morning improve attention and concentration in people working nightshifts? Find out what a recent study showed in the What It Does section of the Melatonin Supplements Review. Also see our Top Picks for Melatonin.
Folate & Memory
August 31, 2020
Older people with high blood levels of folate are more likely to perform worse on tests of memory and cognition unless they have sufficient levels of another B vitamin, according to a recent study. Get the details in the What It Does section of our B Vitamin Supplements Review. Also see our Top Picks among B vitamin supplements.
Fish Oil Slows Atherosclerosis
August 31, 2020
A highly-concentrated prescription fish oil was shown to significantly reduce the progression of atherosclerosis (hardening of the arteries) in people with high triglycerides, according to a recent study. Get the details in the Prescription Fish Oil vs. Supplements section of the Fish Oil Supplements Review. Also see our Top Picks for fish oil.
September
Seasonal Use of Vitamin D
September 03, 2020
The airway's ability to fight infections is reduced during the winter/spring and vitamin D might help, according to a recent study. For details, see the What It Does section of vitamin D Supplements Review. Also see our Top Picks for vitamin D.
Coffee and Cholesterol
September 03, 2020
Drinking large amounts of coffee daily can increase cholesterol levels, according to a recent analysis. Get the details in our answer to the question: Is drinking coffee good or bad for heart health?
Vitamin D and Risk of Death
September 07, 2020
Middle-aged men with very low blood levels of vitamin D were found to be much more likely to die over the next dozen years than men with the highest levels, according to a recent study. Learn more in the What It Does section of Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
Resveratrol for Menopause?
September 07, 2020
Can resveratrol decrease menopausal symptoms in women? Find out what a recent study showed in the What It Does section of the Resveratrol Supplements Review. Also see our Top Picks for resveratrol.
Vitamin D for Autism Spectrum Disorder?
September 07, 2020
Can vitamin D improve symptoms of autism spectrum disorder? Find out what a recent study showed in the What It Does section of Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
Fish Oil During Pregnancy
September 11, 2020
Does taking fish oil during pregnancy lead to cognitive benefits in children? Find out what a recent study showed in the What It Does section of Fish Oil Supplements Review. Also see our Top Picks for fish oil.
Probiotic for Eczema
September 11, 2020
Can applying a probiotic to the skin reduce eczema in children? Find out what a recent study showed in the What It Does section of the Probiotic Supplements Review. Also see our Top Picks for probiotics.
Green Tea and Cholesterol
September 11, 2020
Can green tea help lower cholesterol levels? Find out what a recent study showed in the What It Does section of Green Tea Review. Also see our Top Picks for green tea.
Low Vitamin D and Low Blood Pressure?
September 12, 2020
Vitamin D deficiency has been linked with a form of low blood pressure (orthostatic hypotension) in older men. Get the details in the What It Does section of Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
Ginseng for Desire?
September 12, 2020
Does ginseng improve desire and satisfaction in women? Find out what a recent study showed in the What It Does section of Ginseng Supplements Review.
Too Much Vitamin D Bad for Bone?
September 14, 2020
High doses of vitamin D may lead to loss of bone mineral density in women, according to a recent study. Get the details in the How Much Is Too Much section of our Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
Olive Oil & Breast Cancer Risk
September 14, 2020
Is olive oil consumption associated with a lower risk of breast cancer in women? See what a recent analysis found in the What It Does section of the Extra Virgin Olive Oil Review. Also see our Top Picks for olive oil.
Preventing Muscle Loss with Leucine?
September 14, 2020
Do supplements with leucine (a branched-chain amino acid or BCAA) prevent muscle loss when muscles are immobilized (such as in a leg brace)? See what a recent study showed in the What It Does section of our Muscle & Workout Supplements Review.
Does Ginseng Prevent Colds?
September 16, 2020
Ginseng may increase levels of certain immune cells in the body, but does this result in fewer colds? See what a recent study showed in the What It Does section of the Ginseng Supplements Review.
Turmeric for Knee Pain?
September 17, 2020
Can turmeric reduce pain and swelling in people with knee osteoarthritis? Find out what a recent study showed in the What It Does section of our Turmeric and Curcumin Supplements and Spices Review. Also see our Top Picks among curcumin and turmeric supplements.
Vitamin D for Failing Hearts?
September 17, 2020
Does high-dose vitamin D help or hurt people with chronic heart failure? Find out what a new study showed in the Cardiovascular Disease section of Vitamin D Supplements Review, which also discusses cholesterol, blood pressure and heart attack risk. Also see our Top Picks for vitamin D.
Magnesium for Lowering Blood Pressure?
September 21, 2020
Can magnesium supplementation lower elevated blood pressure? Find out what a new study showed in the What It Does section of the Magnesium Supplements Review. Also see our Top Picks for magnesium supplements.
Does Elderberry Help With Flu Symptoms?
September 21, 2020
Did giving Sambucol (an elderberry extract) to people diagnosed with flu reduce the severity or shorten the duration of symptoms? Find out what a recent study showed in the What It Does section of our Elderberry Supplements Review. Also see our Top Picks among elderberry supplements.
Fish Oil and Eye Bleeding
September 21, 2020
Can high-dose fish oil increase the risk of bleeding in the eye? Get the details of a recently reported case in the Concerns and Cautions section of our Fish Oil Supplements review. Also see our Top Picks for fish oil.
Caution With TUMS
September 21, 2020
A man who took several TUMS to treat heartburn was recently reported to have developed hypercalcemia (too much calcium in the blood), as noted in the Concerns and Cautions section of the Calcium Supplements Review. Learn about getting the right amount of calcium and see our Top Picks among calcium supplements.
Vitamin D for Dizziness When Rising?
September 24, 2020
Can vitamin D reduce symptoms of orthostatic intolerance (low blood pressure when standing up)? Find out what a new study in adolescents showed in the What It Does section of Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
Fish Oil for Menopause?
September 24, 2020
Can taking fish oil reduce symptoms of menopause? Find out what a recent study showed in the What It Does section of our Fish Oil Supplements Review, and see our Top Picks for fish oil. Also see our Menopause Supplements Review for information about other supplements for menopause.
Effect of Milk and Sugar in Coffee
September 25, 2020
A recent study looked at how adding milk and sugar to coffee before a meal affects blood sugar levels. Learn what was discovered in our answer to the question: Which supplements can help lower or control my blood sugar?
Licorice Danger
September 25, 2020
A man died after consuming large servings of licorice for several weeks, according to a recent report. Learn about the risks of licorice and the types of products in which it is found in our article about Licorice Root Tea.
Green Tea for Memory?
September 28, 2020
Can a green tea extract supplement improve memory or cognitive function in healthy, older men and women? Find out what a recent study showed in the What It Does section of our Green Tea Review. Also see our Top Picks for green tea supplements and drinks.
Vitamin D and PCOS
September 28, 2020
Can vitamin D improve symptoms of (polycystic ovary syndrome (PCOS)? Find out what a recent study showed in the What It Does section of Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
October
Algal Oil for Attention?
October 01, 2020
Does algal oil high in DHA improve memory and attention in children? See what a new study found in the What It Does section of Fish and Marine Oil Supplements Review.
Also learn about fish oil for enhancing memory in older people and those with age-related cognitive decline, and see our Top Picks for fish oil.
Vitamin C for Foot Ulcers?
October 02, 2020
Can taking vitamin C help heal foot ulcers in people with diabetes or vascular disease? Find out what a new study showed in the What It Does section of our Vitamin C Supplements Review. Also see our Top Picks for vitamin C.
Undeclared Milk in Dark Chocolates
October 02, 2020
If you're allergic to milk, be aware that about 10% of "dairy free" dark chocolate bars and chips were recently found to contain milk. Learn more in the Concerns and Cautions section of our Dark Chocolates Review. Also see our Top Picks for dark chocolate.
Morning Coffee's Effect on Blood Sugar
October 03, 2020
Many people reach for a cup of coffee in the morning, but might this impair blood sugar control? Find out what a recent study showed in our answer to the question: Which supplements can help lower or control my blood sugar?
Best Absorbed Form of Fish Oil?
October 05, 2020
Which form of fish oil is best absorbed? Find out what two recent studies showed in comparing triglyceride, ethyl ester, and monoacylglyceride forms of fish oil in the Forms of Fish Oil section of Fish Oil Supplements Review. Also see our Top Picks for fish oil.
Can Whey Protein Control Hunger?
October 05, 2020
Can drinking a whey protein shake help control hunger in people who are overweight? Find out what a recent study showed in the What It Does section of our Protein Supplements Review. Also see our Top Picks among protein powders, shakes and drinks.
CBD Interaction With Warfarin
October 05, 2020
High doses of CBD may affect blood clotting and require a dosage adjustment in people taking the blood thinner warfarin, as recently reported. Get the details and learn about other interactions with CBD in the Concerns and Cautions section of our CBD and Hemp Extract Review.
Vitamin D & Depression
October 08, 2020
Do low levels of vitamin D increase the risk of depression? Find out what a recent study showed in the What It Does section of Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
Magnesium for Muscle Soreness?
October 09, 2020
Can magnesium supplementation decrease muscle soreness after exercise? See what a new study found in the What It Does section of Magnesium Supplements Review. Also see our Top Picks for magnesium.
Ginger for Weight Management?
October 09, 2020
Can ginger help burn calories and reduce weight? Find out what recent studies show in the What It Does section of our Ginger Supplements Review. Also see our Top Picks for ginger.
Low Vitamin D & COVID-19 Risk
October 12, 2020
Zinc and Risk of COVID Death
October 12, 2020
A recent study found low blood levels of zinc to be associated with a greater chance of severe symptoms and death in COVID-19 patients. Does this mean that people should supplement with zinc or use zinc lozenges? Find out in the COVID-19 section of our Zinc Supplements and Lozenges Review. Also see our Top Picks for zinc supplements and lozenges.
Microplastics in Seafood?
October 12, 2020
A recent study found unexpectedly high levels of microplastic particles in certain seafoods. Get the details and see which had the highest concentration in the Concerns and Cautions section of section of our Tuna, Salmon and Sardines Review. Also see our Top Picks for tuna, salmon and sardines.
Vitamin K for Weak Bones?
October 12, 2020
Does supplementing with vitamin K2 as MK-7 along with vitamin D and calcium improve bone density in postmenopausal women with weak bones (osteopenia)? Find out what a recent study showed in the What It Does section of Vitamin K Supplements Review. Also, learn about other forms of vitamin K used for increasing bone density and see our Top Picks for vitamin K.
Probiotic for Eczema
October 12, 2020
A probiotic was shown to reduce the extent and severity of atopic dermatitis (eczema) in a recent study. Get the details in the What It Does section of our Probiotics Supplements Review. Also, see our Top Picks for probiotics.
Vitamin C for Vitality?
October 15, 2020
Can taking a vitamin C supplement or eating a vitamin C-rich food improve mood, energy, or overall well-being? Find out what a recent study showed in the What It Does section of the Vitamin C Supplements Review. Also see our Top Picks for vitamin C.
Olive Oil & Cognition
October 15, 2020
Does consuming extra olive oil improve cognitive function in people with mild cognitive impairment? Find out what a recent study showed in the What It Does section of our Extra Virgin Olive Oil Review. Also see our Top Picks for olive oil.
Melatonin for Better Sleep
October 15, 2020
Can melatonin improve sleep in people hospitalized and receiving intensive care? See what a recent study found in the What It Does section of our Melatonin Supplements Review. Also learn about melatonin for improving sleep with other conditions, and see our Top Picks for melatonin.
Resveratrol and Insulin Sensitivity
October 15, 2020
Can resveratrol improve insulin sensitivity or lower blood sugar levels in people who are overweight? See what a new study showed in the What It Does section of our Resveratrol Supplements Review. Also, see our Top Picks for resveratrol.
Melatonin and COVID-19
October 19, 2020
Can melatonin supplementation reduce the risk of death in people with severe COVID-19? See what a recent study showed in the What It Does section of our Melatonin Supplements Review. Also see our Top Picks for melatonin.
Side Effects of Red Yeast Rice
October 22, 2020
As with prescription statin medications for lowering cholesterol, serious side effects can occur with red yeast rice. See what a new review of reported side effects showed in the Concerns and Cautions section of our Red Yeast Rice Supplements Review. Also see our Top Pick for red yeast rice.
Lower Dose Melatonin for Children
October 22, 2020
Vitamin D & Pregnancy
October 23, 2020
Maintaining sufficient blood levels of vitamin D during pregnancy is associated with better health for both mother and baby, including a decreased risk of gestational diabetes, according to a new study. Get the details in the Pregnancy section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
Microplastics in Baby Bottles
October 23, 2020
Preparing infant formula in plastic bottles introduced large amounts of microplastic particles into the formula according to a recent study. Get the details and strategies to avoid this in our answer about microplastics in food and beverages.
High-Dose Vitamin D for COVID?
October 23, 2020
Elderly nursing home residents given high-dose vitamin D had much better survival rates from COVID-19 than other residents, according to a new study. However, the dose given has potential risks. Get the details in the COVID-19 section of the Vitamin D Supplements Review.
How Good Is Generic Thyroid Medication?
October 23, 2020
How well do people with hypothyroidism do on generic versions of levothyroxine (Synthroid)? We've added new information about this to our article about levothyroxine and dietary supplements.
Vitamin D and COVID-19
October 26, 2020
Can taking vitamin D after getting sick with COVID-19 reduce the risk of death? Find out in the COVID-19 section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
MCTs for Cognitive Impairment?
October 26, 2020
Can medium chain triglycerides (MCTs) improve memory and cognition in people with mild cognitive impairment? Find out what a recent study showed in the What It Does section of our Coconut Oil and MCT Oil Review. Also see our Top Picks for MCT and coconut oils.
Protein During Dialysis?
October 26, 2020
People on dialysis (for kidney failure) may lose protein, but do all dialysis patients benefit from protein supplementation? Find out what studies are showing in the What It Does section of our Protein Supplements Review. Also see our Top Picks for protein powders, shakes and drinks.
Vitamin C for COVID-19?
October 30, 2020
Does high-dose vitamin C help people critically ill with COVID-19? Find out what a new report showed in the COVID-19 section of our Vitamin C Supplement Review. Also see our Top Picks for vitamin C.
Melatonin for Insomnia?
October 30, 2020
Can melatonin help middle-aged men and women with insomnia fall asleep faster or improve sleep quality? Find out what a new study showed in the What It Does section of our Melatonin Supplements Review. Also see our Top Picks for melatonin.
Warfarin and Low-Dose Vitamin K
October 30, 2020
Should people on warfarin (Coumadin) take low-dose vitamin K to help stabilize fluctuations in INR? Learn what experts say in the What It Does section of our Vitamin K Supplements Review. Also, learn if other blood thinning drugs are affected by vitamin K in the Concerns and Cautions section of our review.
Fish Oil & Vitamin D for Macular Degeneration?
October 30, 2020
Can taking fish oil and vitamin D reduce the risk of age-related macular degeneration (AMD)? See what a large study found in the Eye Disease section of the Fish Oil Supplements Review. Also see the Vision Supplements Review for our tests of vision supplements, including those that most closely resemble the AREDS2 formula and our Top Picks among products.
November
Muscle Cramps from Lack of Vitamin
November 03, 2020
Painful muscle cramps in an older person resolved after correcting a deficiency in one of the B vitamins, according to a new report. Get the details, and learn which conditions and medications increase the risk of this deficiency, in the B Vitamin Supplements Review. Also see our Top Picks for B vitamin supplements.
Vitamin C to Boost Iron?
November 03, 2020
Vitamin C is often touted to boost iron absorption. But does it really work? Find out what a recent study found in the ConsumerTips section of our Iron Supplements Review. Also, see our Top Picks for iron.
Symptoms of Zinc Deficiency
November 03, 2020
Zinc deficiency can cause a wide range of problems involving the skin, hair, mouth, and immune system. A recent report showed that it can also cause an eczema-like rash. Get the details and learn about the symptoms of zinc deficiency in the What It Is section of our Zinc Supplements and Lozenges Review. Also see our Top Picks for zinc supplements and lozenges.
Potassium and Dialysis
November 03, 2020
People on dialysis are often told to restrict potassium intake, but getting too little potassium can also be a problem according to a new study. Get the details in the Concerns and Cautions section of our Potassium Supplements Review. Also see our Top Picks for potassium supplements.
Fish Oil for Liver Disease?
November 05, 2020
Does taking fish oil help people with nonalcoholic fatty liver disease (NAFLD)? Find out what a recent study suggested in the What It Does section of our Fish Oil Supplements Review. Also see our Top Picks for fish oil.
Vitamin D For Eczema?
November 06, 2020
Can taking vitamin D help improve eczema? Find out what a recent study showed in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
A Different Red Yeast Rice
November 10, 2020
A CL member asked about a newer type of red yeast rice known as Ankascin 568-R Plus. We’ve added information about it to our Red Yeast Rice Review. Also see our Top Pick for red yeast rice.
Biotin for MS?
November 10, 2020
High-dose biotin was tried in people with multiple sclerosis (MS) to see if would reverse MS-related disability. Find out if it helped the Biotin section of the B Vitamin Supplements Review. Also, learn about concerns with high-dose biotin and see our Top Picks for biotin and other B vitamin supplements.
Vitamin D for Cognitive Impairment?
November 13, 2020
Can taking vitamin D improvement memory and thinking in people with mild cognitive impairment? Find out what a recent study showed in the What It Does section of our Vitamin D Review. Also, see our Top Picks for vitamin D.
Side Effects of Lactase Enzyme
November 13, 2020
Lactase supplements (such as chewable pills or liquids) are promoted to reduce gastrointestinal symptoms when consuming lactose in dairy products. Although uncommon, side effects can occur. Learn about these in the Concerns and Cautions section of our Lactase Supplements and Lactose-Free Milks Review. Also see which lactase supplements passed or failed our tests.
High-Dose Fish Oil Concern
November 14, 2020
A major study showed an increased risk of a serious heart condition with high-dose fish oil. Get the details in the Concerns and Cautions section of the Fish Oil Supplements Review. Also see our Top Picks among omega-3 oils.
Heart Risk With Fish Oil
November 17, 2020
Last week we reported on an increased risk of a serious heart problem with use of prescription fish oil. This week, a study suggested a similar issue with even a lower dose of non-prescription fish oil. See the details in the Concerns and Cautions section of the Fish Oil Supplements Review. Also, see our Top Picks among fish oils.
Vitamin K and Breast Cancer Risk
November 17, 2020
Can eating foods high in vitamin K affect the risk of breast cancer? Learn what a recent study showed in the What It Does section of our Vitamin K Supplements Review. Also see our Top Picks for vitamin K supplements.
B-12 for Singers
November 17, 2020
It is commonly believed that a shot of vitamin B-12 improves the performance of professional singers. A placebo-controlled study put this belief to the test. Get the results in the B-12 (cobalamin) section of our B Vitamin Supplements Review. Also see our Top Picks for B-12 and other B vitamins & complexes.
Lactoferrin for Iron Absorption?
November 17, 2020
Can taking lactoferrin with iron boost iron absorption? Learn what studies are showing in the Forms of Iron section of our Iron Supplements review. Also, see our Top Picks for iron.
Vitamin D & Cancer Prevention
November 21, 2020
Taking vitamin D may modestly reduce the risk of advanced cancer in some people, according to a recent study. Learn the details in the What It Does section of our Vitamin D Supplements Review. Also, see our Top Picks for vitamin D.
Chocolate for Cognition?
November 21, 2020
Does eating chocolate improve cognition in postmenopausal women? See what a new study found in the Memory and Cognition section of the Dark Chocolate and Cocoa Review. Also see our Top Picks for dark chocolate, cocoa powders and supplements based on their flavanol content and purity.
Vitamin D for COVID-19
November 25, 2020
Can high doses of vitamin D help COVID-19 patients recover? Find out what two new studies showed in the COVID-19 section of our Vitamin D Supplements Review. Also, see our Top Picks for vitamin D.
Vitamin D and Arthritis
November 25, 2020
Studies are showing an association between vitamin D levels and rheumatoid arthritis. Learn more in the What It Does section of our Vitamin D Supplements Review. Also, see our Top Picks for vitamin D.
Probiotic for Cognition?
November 25, 2020
Can taking a probiotic improve cognitive functioning? Find out what a recent study found using a widely-available brand of probiotics in the What It Does section of the Probiotic Supplements Review. Also see our Top Picks for probiotics.
December
Vitamin D and Hearing Loss
December 01, 2020
A recent analysis showed low levels of vitamin D to be associated with hearing loss. Learn more in the What It Does section of our Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
Cocoa for Cognition
December 01, 2020
A new study suggests that cocoa may improve some aspects of cognitive function in healthy people and sheds some light on how this may work. See the details in the Memory and Cognition section of the Dark Chocolate and Cocoa Review. Also see our Top Picks among dark chocolates, cocoa powders and supplements.
Fish Oil & Testosterone?
December 01, 2020
Can fish oil supplementation increase testosterone levels in men? Find out what a new study found in the What It Does section of the Fish Oil Supplements Review. Also see our recent Top Picks for fish oil.
Cranberry for Overactive Bladder?
December 05, 2020
Can cranberry supplements help with overactive bladder? See what a new study found in our article about Cranberry and Urinary Health.
Yacon Syrup for Weight Management?
December 05, 2020
A new study tested whether yacon syrup can affect hunger hormones and decrease appetite after eating. See the results in our updated answer to the question: Does yacon syrup help with weight management? How do I find a quality brand?
Do Creatine or BCAAs Boost Strength?
December 05, 2020
When coupled with resistance exercise, does supplementation with creatine or branched chain amino acids (BCAAs) further boost muscle strength? Find out what separate recent studies showed for creatine and BCAAS in the "What It Does" section of our Muscle & Workout Supplements Review. Also, see our Top Pick for creatine and BCAA supplements.
Cholesterol-lowering Statins May Affect Vitamin D Levels
December 08, 2020
Statin medications may increase or decrease blood levels of vitamin D depending on the version. Get the details in the Statins and Vitamin D section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
Too Much Vitamin D
December 08, 2020
A 2-year study suggests risks with vitamin D at daily doses of 1,000 IU and higher. Get the details in the Muscle, balance and falls section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
Collagen for Wound Healing?
December 12, 2020
Can collagen supplements improve the healing of skin and tendon injuries? Find out in the What It Does section of the Collagen Supplements Review. Also see our Top Picks for collagen.
How Important Is Prenatal Vitamin D?
December 12, 2020
Does high-dose vitamin D during pregnancy improve motor skills and cognition in offspring? Learn what a recent study showed in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
High-Dose Fish Oil for COVID?
December 15, 2020
A two-week course of high-dose, high-concentration fish oil was reported to reduce inflammation and symptoms in COVID patients in a preliminary study. See the details in the What It Does section of the Fish Oil Supplements Review. Also, see our Top Picks for fish oil supplements.
Ginger for Indigestion?
December 15, 2020
Can taking ginger extract help reduce symptoms of indigestion? Find out what a recent study showed in the What It Does section of the Ginger Supplements Review. Also, see our Top Picks for ginger supplements.
Omega-7s to Lower Cholesterol?
December 15, 2020
Can taking sea buckthorn, a source of omega-7 fatty acids, lower cholesterol in people with high cholesterol levels? Find out what a recent study found in the Omega-7 Fatty Acids section of our Fish Oil Review. Also, see our Top Picks among fish oil supplements.
Melatonin for COVID-19?
December 19, 2020
Can melatonin reduce the duration of symptoms in people with COVID-19? Get the details in the COVID-19 section of our Melatonin Supplements Review. Also, see our Top Picks for melatonin.
Melatonin for Anxiety?
December 19, 2020
Can taking melatonin reduce anxiety before surgery? Find out what a recent analysis of studies showed in the What It Does section of the Melatonin Supplements Review. Also, see our Top Picks for melatonin.
Probiotic to Prevent Colds?
December 19, 2020
Can taking a probiotic prevent colds or reduce cold symptoms? See what a new study found in the What It Does section of our Probiotic Supplements Review. Also, see our Top Picks for probiotics.
Probiotic for Protein Absorption?
December 19, 2020
Can a probiotic improve the absorption of amino acids from protein supplements? Find out what a recent study showed in the What It Does section of our Probiotic Supplements Review. Also, see our Top Picks for probiotics.
Eggs and Heart Disease Risk
December 22, 2020
Do women who eat eggs every day have a higher risk of heart disease or death? See what a new study found in the ConsumerTips section of the Choline Supplements Review.
B-12 for Eczema?
December 22, 2020
Can vitamin B-12 deficiency worsen eczema and can supplementing with B12 help? Find out what happened in a recent case in the vitamin B-12 section of section of our B Vitamin Supplements Review. Also, see our Top Picks for vitamin B-12.
