Reviews and Information for Niacin/Niacinamide/Other
B Vitamin Supplements
Read our reviews of B vitamin supplements to find the best B complex, niacin, B-6, B-12, biotin, thiamin and folate, including "methyl" forms such as methylfolate. Get information about dosage, safety, and B vitamins for energy, memory, depression and more.
B Vitamin Supplements Review
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Product Review
Multivitamin and Multimineral Supplements Review
Best Multivitamins -- Caution with Gummies
Product Review
Nutritional Yeast Review
Inaccurate Labeling Discovered on Most Nutritional Yeasts. Best Fortified and Non-Fortified Products Identified.
CL Answer
My HDL (good) cholesterol level is low. Should I take niacin to raise my HDLs?
Learn more about niacin and find out if it can raise HDL ("good") cholesterol levels.
Product Review
Protein Powders, Shakes, and Meal Replacements Review
Find Out Which Protein Products Passed or Failed Our Tests
CL Answer
If I already take red yeast rice, would adding high-dose niacin help further reduce my cholesterol levels, and would this be safe?
Learn more about the effect of combining red yeast, statins and high-dose niacin on cholesterol and safety.
Product Review
Tuna, Salmon, Sardines & Herring Review (Canned and Packaged)
Find Products With the Least Mercury and Most Omega-3s
CL Answer
Which supplements or foods can help lower cholesterol and keep my heart healthy? Are there any to avoid?
Information about heart health supplements & vitamins that help with cholesterol, including sterol esters, CoQ10, and vitamin D, and which may be bad for the heart, like calcium.
Product Review
Electrolytes & Sports Drinks Review
See Which Sports Drinks, Powders, and Pills Deliver the Right Electrolytes
Clinical Update
12/19/2024
When Taking Niacin Is Crucial
Although not common, be aware that niacin deficiency can cause pellagra – a condition characterized by delusions, diarrhea, and scaly skin sores. Taking niacin can rapidly reverse these symptoms. Learn more, including conditions that can cause niacin deficiency, in the Niacin section of our B Vitamins Review, which includes our Top Pick for niacin.
CL Answer
Which vitamins and supplements should be stopped before getting blood work, laboratory tests, or medical imaging?
Find out which vitamins and supplements can interfere with blood, urine or stool tests, and imaginging tests, like bone scans and MRIs. Learn how B vitamins such as biotin, niacin and riboflavin, as well as calcium supplements, St. John’s wort, vitamin C, and others supplements can affect test results, as well as common foods that may interfere with tests.
Product Review
Cholesterol-Lowering Supplements Review (Sterols/Stanols and Policosanol)
Find the Best Cholesterol-Lowering Supplement. See Which Plant Sterol and Policosanol Supplements Passed Our Tests and Are Our Top Picks.
Clinical Update
4/19/2017
Niacin & Skin Cancer
People who don't get enough niacin each day may be able to lower their risk of developing squamous cell skin cancer by getting a bit more niacin from their food or supplements suggests a recent analysis. However, this doesn't mean you should overdo it. For details, see the "Niacin" section of the B Vitamin Supplements Review. You can also find foods high in niacin using the food table in the report.
Clinical Update
5/31/2011
Niacin Concern Stops Cardiovascular Study
A clinical trial using high dose niacin (vitamin B3) was recently stopped by the National Institutes of Health due to lack of benefit and a small increase in strokes. Patients in the study had cardiovascular disease and were already taking a statin drug to keep LDL ("bad") cholesterol levels low. The addition of high dose niacin was intended to increase HDL ("good") cholesterol, reduce elevated triglycerides, and, most importantly, reduce the risk of heart attacks and stoke. For more information, including the amount and type of niacin used in the study and additional information about niacin and niacin supplements, see the B Vitamin Supplements Review. More >>
Product Review
Gluten-Free Grains Review (Buckwheat, Quinoa, Sorghum, Millet, and Teff)
31% of Gluten-Free Grains Fail Our Tests Due to Contaminants. Quinoa, Buckwheat, Sorghum, Millet and Teff Tested.
Product Review
Nutrition Bars & Cookies Review (For Energy, Fiber, Protein, Meal Replacement, and Whole Foods)
Find the Best Nutrition Bar or Cookie. ConsumerLab Tests Reveals Not All Nutrition Bars and Cookies Contain What They Claim.
CL Answer
Is there a risk of liver toxicity with certain supplements?
Find out if there is risk of liver damage from supplements such as green tea, niacin, red yeast rice and vitamin A.
Clinical Update
11/20/2011
No Benefit of Niacin with Statins
According to a recently published study, high dose niacin added to statin drug treatment does not further reduce the risk of heart attacks and stroke despite improvements in levels of HDL cholesterol and triglycerides. In fact, there was a small increase in strokes among those taking niacin. However, a role remains for high dose niacin in lipid treatment. For details, see the update to the B Vitamin Supplements Review.
Clinical Update
10/11/2016
Niagen Form of Niacin May Cause Flushing
Niacin is known to cause flushing (redness) and skin tingling at moderate doses. Other forms of niacin are said cause less flushing. One of these is Niagen. However, results of a recently published study suggest that it can cause flushing and "hotness" after just a single dose. More details are in the "Niacin" section of the B Vitamin Supplements Review >>
Clinical Update
Clinical Update
9/19/2024
Niacin-Induced Liver Failure
Be aware of the risk of liver injury from use of very high dose niacin, as recently reported in an otherwise healthy, young woman who was taking niacin to manage anxiety and depression. Get the details in the Niacin (Nicotinic Acid) (B-3) section of our B Vitamin Supplements Review, which includes our Top Picks for B vitamins.
Also see: Is there a risk of liver toxicity with certain supplements?
CL Answer
Risks of Too Many Vitamins & Supplements
Taking too many vitamin supplements -- or taking too much of a particular supplement -- can have short and long-term adverse effects.
CL Answer
Supplements That May Be Needed When Following a Gluten-Free Diet
Find out if supplements such as folate, vitamin B-12, niacin, thiamin, iron, vitamin D, and/or fiber are needed when following a gluten-free diet. Also learn how to find gluten-free supplements on ConsumerLab.com.
Product Review
Farro and Bulgur Review
See How Bob's Red Mill Compares to Trader Joe's
Product Review
Chia Seed Review — Whole, Ground, and Sprouted Seed, Seed Flour, & Supplements
Find the Best Chia Seeds, Sprouted Chia Powder, Flour, and Chia Supplements. Tests and Reviews of Chia Seeds & CL's Top Picks.
CL Answer
Can taking too much vitamin B-12 be dangerous? The label on my B-complex states it contains 50,000% of the Daily Value!
Find out the daily value for vitamin B-12 and the potential side effects of taking too much B-12. ConsumerLab explains why taking too much vitamin B-12 can be harmful.
Product Review
NAD Booster Supplements Review (NAD+/NADH, Nicotinamide Riboside, and NMN)
How Important Is Boosting NAD+ Levels? Find Out and Learn How Booster Supplements Compare.
CL Answer
I thought the B vitamins were all water soluble and did not build up in the body, so you would not build up toxic levels. Am I wrong?
Learn more about water-soluble B vitamins including niacin, B6, B12 and folic acid, and why taking too much of these vitamins can be toxic. See the symptoms of overdose and toxicity from B vitamins. ConsumerLab.com's answer explains.
Clinical Update
5/03/2022
Niacin & Shock-like Symptoms
Taking very high doses of niacin can cause symptoms resembling anaphylactic shock, as was recently reported. Get the details in the Niacin section of our B Vitamin Supplements Review.
Clinical Update
12/19/2023
Caution With High-Dose B Vitamins
Vitamin B-6: Regularly taking a higher than required dose of vitamin B-6 may cause nerve damage, as was recently reported. Get the details in the B-6 section of our B Vitamin Supplements Review.
Niacin: A large increase in niacin dosage may cause fainting, as was recently reported. Get the details in the Niacin section of our B-Vitamin Supplements Review.
Clinical Update
2/23/2024
Heart Concern with High-Dose Niacin
New research suggests a negative effect of high-dose niacin, possibly explaining why it doesn’t reduce cardiovascular disease despite improving cholesterol levels. For details, see the Niacin section of our B Vitamins & Complexes Review, which includes our Top Picks among products.
Clinical Update
2/03/2023
Niacin & Cancer?
The NAD booster, nicotinamide riboside, might promote growth of existing cancers. Is there similar risk with niacin and niacinamide (nicotinamide)? Find out what evidence suggests in the Concerns and Cautions section of our NAD Booster Supplements Review.
Also, see our Top Pick among niacin supplements in our B Vitamin Supplements Review.
Clinical Update
1/10/2021
Magnesium, Niacin and Blood Pressure
Two studies this week showed the risk of high blood pressure to be lowest among people with adequate, but not excessive, dietary intakes of magnesium and niacin.
Also, see which foods are good sources of magnesium and, separately, good sources of niacin.
Clinical Update
7/10/2021
Niacin for Parkinson's?
Can niacin supplementation improve symptoms or slow decline in people with Parkinson's disease? See what a new study found in the Niacin section of our B Vitamin Supplements Review.
Also see our answer to the question: Do supplements help with Parkinson's disease treatment or prevention?
Clinical Update
Clinical Update
7/20/2019
Is Niagen Safe?
Niagen (nicotinamide riboside) was recently studied for its safety and ability to raise NAD+ in the body. See the results and learn more about this form of niacin (which is also in the product Basis) in the Niacin section of the B Vitamin Supplements Review. Also see our Top Picks for niacin and other B vitamin supplements.
Clinical Update
11/11/2019
Platelet Concern With High-dose Niacin
Long-term use of high-dose niacin may lower platelet counts. Learn more in the Niacin section of the B Vitamin Supplements Review.
Clinical Update
11/01/2019
Eye Risk With High-Dose Niacin
Very high doses of niacin are sometimes used to lower high cholesterol, but there are risks -- including damage to the eye, as shown in a recent case. Get the details in the Niacin section of the B Vitamin Supplements Review.
Clinical Update
5/16/2015
Niacin Reduces Skin Cancer
A recent study suggests that high-dose niacin (vitamin B-3) may reduce the risk of developing certain types of skin cancer. A closer look at the study, however, raises questions about its relevance to people in North America. Get the details, as well as more information about niacin and our product test results & comparisons, in the B Vitamin Supplements Review >>
CL Answer
When taking a statin drug like Lipitor or Crestor, are there supplements I should avoid or take?
Learn about the interactions between certain supplements and atorvastatin (Lipitor), rosuvastatin (Crestor), and other cholesterol-lowering statins.
CL Answer
Do supplements help with Parkinson’s disease treatment or prevention?
Learn what has been shown with vitamins D and E, niacin, CoQ10, melatonin, creatine, SAMe, NAC, valerian, CoQ10, and CBD, as well as with coffee and the Mediterranean and MIND diets for treating and/or preventing Parkinson's disease.
Product Review
Joint Health Supplements for Pets Review (Glucosamine, Chondroitin, MSM & Boswellia)
See Which Pet Supplements for Joint Health Passed Our Tests and Which Didn't!
CL Answer
What are the most common, potentially dangerous interactions between supplements and drugs?
Info on the most common, potentially dangerous, interactions between drugs & supplements, including Lisinopril interactions and others.
CL Answer
Which foods are a good source of B vitamins?
Find out which foods are a good source of B vitamins (like folate and B-12) and when you should take Vitamin B supplements.
Product Review
CoQ10 and Ubiquinol Supplements Review
Find the Best CoQ10 and Ubiquinol Supplements and Learn How They Differ
Product Review
Fruits, Veggies, and Other Greens Supplements Review (Including Spirulina and Chlorella)
Avoid Lead in Greens, Problems with Pills, and Don't Give Up Eating Whole Foods.
Product Review
Olive Leaf Extract Supplements Review
Learn What Olive Leaf Does and the Best Brands
Product Review
Lion's Mane and Chaga Supplements Review
Read Labels Carefully -- Many Can Mislead
Product Review
Lavender and Tea Tree Essential Oils Review
Oils Tested for Authenticity and Purity
Product Review
Rolled Oats and Steel-Cut Oats Review
Find the Best Rolled and Steel-Cut Oats -- Beware of Unexpected Gluten.
CL Answer
Which supplements and foods help with gout and which may worsen it?
Find out about the effects on uric acid levels and gout of fish and fish oil, coffee, beer, animal meat, milk proteins, vegetable proteins, fructose, lemon juice, tart cherry juice, vitamin A, vitamin C, and niacin
Clinical Update
1/13/2021
Nicotinamide Riboside to Slow Aging and Reverse NAD+ Decline?
Nicotinamide riboside, a form of niacin, has been promoted to slow aging, partially based on the belief that it raises NAD+ levels that fall with age. A new study raises doubts about this. Get the details in the Niacin section of our B Vitamin Supplement Review. Also, learn about a concern with taking too much nicotinamide riboside.
Clinical Update
3/17/2013
Concern Over Niacin
You may have heard that a recent study suggests that supplementing with niacin at high doses does more harm than good. This appears to be true in only certain situations. Get the facts in the update to the B Vitamin Supplements Review >>
Clinical Update
10/24/2015
Niacin Helps Prevent Skin Cancers
A study published this week showed that taking a form of niacin daily significantly lowered the rate of new basal-cell and squamous-cell skin cancers in patients with a history of such cancers. For details about the supplement and dose, see the B Vitamins Review >>
Clinical Update
7/19/2014
High-Dose Niacin with Statins Not Worth It
Further evidence was published this week showing that the addition of high-dose niacin (vitamin B-3) to cholesterol-lowering treatment with statin drugs provides no worthwhile benefit and appears to increase the risk of adverse side events. For details, see the Review of B Vitamin Supplements and Energy Drinks >>
Clinical Update
9/19/2017
Niacinamide for Alzheimer's Disease?
Niacinamide (a form of niacin) has been promoted as a way to protect against memory loss associated with Alzheimer's disease – a claim based on studies in mice. A recent study put this to the test in people. See the results in the "Niacin" section of the B Vitamin Supplements Review >>
Product Review
Vitamin C Supplements Review
Find the Best Vitamin C Supplements
News Release
February 24, 2025
Widespread Mislabeling of Nutritional Yeasts Uncovered by ConsumerLab – 90% of Nutritional Yeasts Fail Tests
White Plains, NY, February 24, 2025— Nutritional yeast can add a savory flavor to foods and be a good source of protein, fiber, and niacin. Fortified nutritional yeast can also provide vitamins B-6 and B-12, making it a common addition to vegan and vegetarian dishes.
CL Answer
I'm over 50 and looking to take a vitamin B-12 supplement. Many contain a form of vitamin B-12 called cyanocobalamin, yet I read on the Internet that this form is toxic. Should I be concerned?
Looking to see if the cyanocobalamin form of vitamin B-12 is safe? Read research and safety information on ConsumerLab's report.
CL Answer
Is it okay to take vitamin D3 and fish oil together?
Find out if taking vitamin D and fish oil is okay, how it effects absorption, and the best way to take vitamin D to improve absorption. ConsumerLab.com's answer explains.
CL Answer
Which supplements can help lower my triglycerides?
Find out whether fish oil supplements, or plant-based oil supplements, such as flaxseed oil and echium oil are best for lowering triglyceride levels. ConsumerLab.com's answer explains.
Product Review
L-Arginine Supplements Review
Choose the Best L-Arginine Supplement. Find Out Which L-Arginine Supplement Passed CL's Tests.
CL Answer
Can taking too much vitamin B-6 be dangerous?
Find out if multivitamins contain excessive amounts of B-6, how much B-6 is too much, and symptoms of toxicity and overdose.
CL Answer
Is it better to get vitamins from foods or supplements, and are natural vitamins better than synthetic vitamins?
Learn more about the benefits of getting vitamins from food versus supplements, natural versus synthetic vitamins, and more.
CL Answer
Do hair loss supplements, such as Viviscal, Hair La Vie, and Nutrafol, or topical essential oils work?
Vitamins and supplements that may help with hair loss and thinning, including saw palmetto, beta-sitosterol, protein, iron, and vitamin D.
News Release
October 17, 2024
Not All B Vitamin Supplements Contain What They Claim, According to ConsumerLab Tests
White Plains, NY, October 17, 2024 — Recent ConsumerLab tests revealed that 19% of popular B vitamin complexes and individual B vitamin supplements selected for testing contained far less, or far more of one or more B vitamins than claimed on the label.
Recalls & Warnings
November 21, 2024
Douglas Labs Stress-B-Plus Recalled
On October 7, 2024, Nestle Health Science (NHS U.S., LLC) issued a recall of two lots of Douglas Labs Stress-B-Plus because it contains incorrect information on the label.
CL Answer
Can vitamins or other supplements cause a change in the ability to taste, or even a loss of taste?
Find out if supplements or vitamin deficiencies can cause changes in taste, loss of taste or smell. Information about vitamin D, zinc, vitamins A, B6, B12 and others. Plus medications and medical conditions that can alter taste and smell. ConsumerLab.com's answer explains.
News Release
June 14, 2022
Best B Complexes, B12, and Other B Vitamin Supplements Revealed by ConsumerLab Tests: Beware of High Doses
White Plains, New York, June 14, 2022 — Recent ConsumerLab tests of over 30 popular vitamin B complexes and supplements revealed that four products contained either much less, or much more, of at least one B vitamin listed on the label.
CL Answer
What is inositol hexaphosphate (IP6) and myo-inositol? Are they helpful in treating cancer or other conditions?
Inositol hexaphosphate (IP6): Find out if IP6 (also known as phytic acid) can prevent or treat cancer. Clinical evidence, dosage, safety and how IP6 differs from myo-inositol. Consumerlab.com's answer explains.
CL Answer
What are the possible health benefits of fenugreek, and is it safe?
Fenugreek is promoted for boosting testosterone, increasing breastmilk production, lowering blood sugar, improving symptoms of polycystic ovary syndrome (PCOS), and other conditions, but does it work? Find out.
Product Review
Green Coffee Bean Extract Supplements Review (for Weight Loss)
Choose the Best Green Coffee Bean Extract. 50% of Green Coffee Bean Extract Supplements Don't Deliver Expected Ingredients.
News Release
February 12, 2021
Don't Be Surprised by New Labels on Many Vitamins
White Plains, New York, February 12, 2021 — It took almost four years, but more accurate labels on vitamin and mineral supplements are finally here and consumers should not be surprised to see changes, says Tod Cooperman, M.D., president and founder of ConsumerLab.
CL Answer
I read that sterol supplements to lower cholesterol like CholestOff can block the absorption of vitamins. Is that true?
Find out if CholestOff and other sterol supplements can block vitamin absorption in the body and other safety concerns.
Product Review
Rhodiola Rosea Supplements Review
Do Rhodiola Supplements Help With Depression and Anxiety? Find Out and See Which Rhodiola Supplements Provide the Best Quality & Value.
Product Review
Iron Supplements Review (Iron Pills, Liquids and Chews)
See Which Iron Supplements Are CL's Top Picks for Different Needs
Product Review
Lactose Intolerance Products Review (Lactase Enzyme Supplements and Lactose-Free Milks)
Choose the Best Lactase Enzyme Supplement and Lactose-Free Milk. Find a CL Approved Lactose Intolerance Product.
CL Answer
Which supplements can help to lower blood pressure?
Supplements to lower blood pressure, including CoQ10, vitamin C, fish oil, and olive oil, are all explored to find out what works.
Product Review
Menopause Supplements Review (Soy and Red Clover Isoflavones, Black Cohosh) and Progesterone Creams
Choose the Best Menopause Supplement. Find Out Now Which Soy Isoflavone, Red Clover, Black Cohosh, and Progesterone Products Have the Active Compounds You Want!
Product Review
Ginkgo (Ginkgo Biloba) Supplements Review
Choose the Best Ginkgo Biloba Supplement. Finding Real Ginkgo Isn't Easy — 60% Fail ConsumerLab's Tests of Quality.
Product Review
Seaweed Snacks and Foods Review
Tests Reveal Seaweed Snack Risks
CL Answer
I take warfarin (Coumadin), an anticoagulant drug. Are there supplements I should avoid, or be taking, due to this drug?
Find out which supplements should be avoided when taking blood thinners (anticoagulants) like warfarin (Coumadin), including vitamin K, St. John's wort, and curcumin.
CL Answer
What B-vitamin complex do you recommend for older people?
Vitamin B complex supplement recommendations, benefits and top rated brands for older people and all ages.
Clinical Update
1/20/2025
Nicotinamide for Glaucoma?
Some preliminary research suggests nicotinamide (a form of niacin) may help with glaucoma, but is this recommended? Find out in our B Vitamins Supplements Review, which includes our Top Picks among B vitamin supplements.
Clinical Update
1/16/2024
Trigonelline?
Fenugreek contains trigonelline, a derivative of niacin. Find out what potential concerns, as well as health benefits, have been suggested for this compound in our article about fenugreek.
Clinical Update
6/19/2019
NAD+ and Cancer?
Supplements that raise NAD+ levels in the body have been promoted for anti-aging effects. But there is a theoretical risk that they could stimulate cancerous cells, and a CL member reported this week that a supplement containing such an ingredient, nicotinamide riboside, appeared to increase his PSA level. Learn more in the Niacin section of the B Vitamin Supplements Review.
Clinical Update
4/03/2018
What Niagen Does
Niagen (nicotinamide riboside) has been promoted as an anti-aging supplement. Find out what's been shown in clinical studies, including one published recently, in the Niacin section of the B Vitamin Supplements Review.
Clinical Update
9/21/2013
B Vitamin Supplements for Stroke?
A review of 14 clinical studies suggests that B vitamins may help prevent stroke. However, a deep reading of the report shows the benefit to be slight, at best. For details about the study, other uses of B vitamins (including B6, B-12, folic acid, niacin and complexes), and tests of these supplements, see the B Vitamin Supplements Review>>
News Release
June 25, 2019
ConsumerLab Tests Reveal Best B Vitamin Supplements -- 19% of B Vitamin Supplements Fail CL's Tests of Quality
White Plains, New York, June 25, 2019 — B vitamins and complexes are among the most popular supplements sold in the U.S. because B vitamins are essential for a wide range of functions in the body.
News Release
April 26, 2019
Best Cholesterol-Lowering Supplements (Sterols, Stanols & Policosanol) Identified by ConsumerLab
White Plains, New York, April 26, 2019 — Plant sterols (also called phytosterols) and stanols, and, possibly, policosanol, can help lower elevated levels of cholesterol, a key risk factor for heart disease.
CL Answer
Which supplements help with Raynaud's phenomenon?
Raynaud's phenomenon may be helped by some supplements. Learn more about fish oil, Gingko biloba, and ginseng.
CL Answer
Can prenatal vitamins have too much folic acid? Mine has 800 mcg, but isn't that more than what's recommended? Is this dangerous to me or my baby?
Is it possible for prenatal vitamins to have too much folic acid? Find out the correct dosage so that it is not dangerous to babies.
CL Answer
What is desiccated beef liver? What is it used for, and is it safe?
Description of desiccated beef liver, including what it is used for, its nutrient content, and safety concerns.
CL Answer
What are "broad-spectrum micronutrient" supplements, and do they have greater health benefits than multivitamin/multimineral supplements?
Learn about "broad-spectrum micronutrients" and how they compare to multivitamin/multimineral supplements.
CL Answer
Do any supplements help prevent or improve cataracts?
Find out which supplements may help with cataracts, including selenium and vitamins A, B1, B3, C, and E.
CL Answer
Is P-5-P really better than "regular" vitamin B6?
Learn more about pyridoxal-5-phosphate (P-5-P) and vitamin B6.
News Release
November 01, 2017
Gummies Are Most Likely to Fail Testing in Review of Multivitamins -- Best and Worst Multivitamins Identified by ConsumerLab Testing
White Plains, New York, November 1, 2017 — Multivitamin/multimineral supplements are among the most popular supplements, with many consumers relying on them to provide nutrients they may not get from their diets. However, ConsumerLab.
CL Answer
How do the Beyond Burger, the Impossible Burger, and a beef burger compare in terms of vitamins and minerals, and which is best?
Read our comparison of the Beyond Burger and the Impossible Burger, plant-based, meat alternative burgers. Compare nutrition, vitamins and minerals. ConsumerLab.com's answer explains.
News Release
February 23, 2017
ConsumerLab.com Reveals Best and Worst B Vitamin Supplements and Why Current Labels Often Mislead
White Plains, New York, February 24, 2017 — B vitamins and complexes are popular supplements, but labels often mislead, says a new report from ConsumerLab.com which tested, reviewed, and compared 49 supplements from the U.S.
Recalls & Warnings
November 04, 2016
Energy Drink Linked to Case of Acute Hepatitis
A case of acute hepatitis has been linked to daily consumption of energy drinks, according to a report published on November 1, 2016, in BMJ Case Reports.
CL Answer
What does "%DV" (Daily Value) mean on a supplement label, how does it differ from RDAs, and should anyone take more than the DV for a nutrient?
Find out the difference between RDAs (Recommended Daily Allowances) and DVs (Daily Values) for vitamins and minerals, and learn whether certain groups of people should take more than the 100% DVs for vitamins and minerals.
CL Answer
My doctor warned me that red yeast rice can cause liver damage - is that true?
Can red yeast rice cause liver damage? More information on its effects, including possible danger to the liver and kidneys.
CL Answer
Are there any supplements I should avoid when taking acetaminophen (Tylenol)?
Find out if there are any supplements that should be avoided when taking acetaminophen (Tylenol).
CL Answer
Do any supplements, foods or lifestyle modifications help with brain function, like memory and cognition?
Find out which supplements help improve memory, brain function and cognition, including fish oil, some B vitamins, cocoa, and curcumin. ConsumerLab's answer explains the evidence for supplements promoted to help with brain function and cognition.
News Release
July 27, 2016
ConsumerLab.com Helps Consumers Make Sense of the FDA's Updated Daily Values (DV) for Vitamins and Minerals
White Plains, New York, July 27, 2016 — Daily Values (DV) for certain vitamins and minerals have been changed by the FDA, as part of the agency's revised rules for nutrient and supplement facts labeling. The changes went into effect on July 26, 2016.
CL Answer
Do any supplements help prevent or reduce eye floaters?
Find out eye floaters (vitreous floaters) be treated with supplements like vitamin C, lutein, ginkgo, milk thistle, collagen or hyaluronic acid, or with products such as VitreousHealth.
CL Answer
Is there a multivitamin that contains only the recommended daily vitamins and minerals? Most that I have looked at contain more.
Are there any multivitamins that contain only the recommended daily vitamins and minerals? Choose the best multivitamin based on age & gender.
News Release
January 12, 2016
Problems Found with 32% of Multivitamin/Multimineral Supplements -- ConsumerLab.com Identifies Good Choices for Men, Women, and Children
White Plains, New York, January 12, 2016 — You can't always judge a supplement by its label -- or by its price, according to a new report from ConsumerLab.com, which recently tested dozens of multivitamin/multimineral supplements.
CL Answer
Which supplements reduce hearing loss?
Can supplements such as alpha-lipoic acid, magnesium, N-acetyl-cysteine, folate or vitamins B-12, C and/or E help prevent or improve symptoms among people with hearing loss due to excessive noise or aging? Find out what the clinical evidence shows, and learn whether Advanced Hearing Formula, a supplement marketed for ear health, is likely to help.
CL Answer
Is it better to take fish oil, flaxseed oil -- or both?
Fish oil and flaxseed oil -- how they are different, what they are used for, if and how they can help with arthritis, depression, lowering cholesterol & more.
CL Answer
I read an article stating that some of the ingredients in Centrum multivitamins may be dangerous or toxic. Is that true?
Learn more about the safety of ingredients in Centrum, including binders, fillers, and coloring agents.
News Release
July 22, 2014
Which Supplements Help Lower Cholesterol? ConsumerLab.com Identifies Best Products by Reviewing Evidence and Testing Quality
White Plains, New York, July 21, 2014 — Certain dietary supplements can help reduce elevated cholesterol levels. A new report from ConsumerLab.com reviews the evidence behind each of the popular cholesterol-lowering ingredients and provides test results for twelve supplements.
News Release
September 27, 2012
ConsumerLab.com Reveals How Much Caffeine is in Energy Drinks -- Also Finds Some Drinks and Dietary Supplements Don't Contain Claimed Amounts of B Vitamins
White Plains, New York — September 27, 2012 — Energy shots and drinks are promoted to keep you alert and energized, attributing their effects to special formulas often "packed with B vitamins and nutrients to make it last," as a commercial for 5-hour Energy proclaims.
News Release
October 26, 2010
ConsumerLab.com reports deficiencies in some B-complex supplements and more caffeine than expected in "shot-sized" B vitamin "energy" drinks
White Plains, New York — October 26, 2010 — Tests of B vitamin supplements, including B-complexes and shot-sized energy drinks, revealed problems with the quality of 4 out of 18 products selected for review by independent testing organization ConsumerLab.com.
Recalls & Warnings
November 04, 2016
Liver Injuries Linked With Dietary Supplement Use on the Rise
The number of liver injuries associated with dietary supplement use has increased substantially in recent years, according to a recently published study in the journal Hepatology.
Recalls & Warnings
December 01, 2020
Niagen Cannot Be Promoted to Prevent or Treat COVID-19, Warns FDA
On November 17, 2020, the FDA issued warning letters to the sellers of Niagen and Nadovim, supplements that contain different forms of niacin, for selling products with unsupported claims that they can treat coronavirus (COVID-19).
News Release
March 25, 2010
Cholesterol-lowering supplements reviewed by ConsumerLab.com: Many pass quality testing, one fails. Sterol and policosanol products analyzed. Evidence for other cholesterol-lowering ingredients evaluated
White Plains, New York — March 25, 2010 — Certain dietary supplements can help reduce elevated cholesterol levels. A new report from ConsumerLab.com reviews the evidence behind each of the popular cholesterol-lowering ingredients and provides test results for twelve supplement brands.
News Release
March 31, 2009
ConsumerLab.com Warns of Problems with Multivitamins and Vitamin Water -- Defects Found in Over 30% of Supplements Selected for Testing; Several Popular Children's Multis Exceed Tolerable Upper Intake Levels
WHITE PLAINS, NEW YORK — MARCH 31, 2009 — Over 30% of multivitamins recently selected for testing by ConsumerLab.com were found to contain significantly more or less ingredient than claimed or were contaminated with lead.
Recalls & Warnings
May 24, 2016
Seller of Joint Health, Omega-3 Supplements & More Warned for Manufacturing Violations, Drug Claims
On May 13, 2016, the FDA issued a warning letter to Rocky Fork Formulas, Inc.
Recalls & Warnings
June 12, 2023
Children's Liquid Vitamin Supplement Recalled
On June 7, 2023, Procaps S.A. de C.V. issued a voluntary recall of various lots of Laboratorios Lopez’s Bacaolinita 8 fl. oz children's liquid vitamin supplement because it contains undeclared PEG-40 hydrogenated castor oil.
News Release
September 10, 2007
Tests of B-vitamins by ConsumerLab.com finds several short on folic acid — New report covers B-complexes, thiamin, niacin, B-6, B-12, biotin and folic acid supplements
WHITE PLAINS, NEW YORK — SEPTEMBER 10, 2007 — Half of the B-complex supplements recently selected by ConsumerLab.com for testing were found to lack the total claimed amounts of folic acid, an essential nutrient also known as vitamin B-9.
Recalls & Warnings
September 01, 2022
Elite One Source Nutritional Services Warned for Manufacturing, Labeling Violations
On August 5, 2022, the FDA issued a warning letter to dietary supplement manufacturer Nutritional Laboratories International, Inc. (DBA Elite One Source Nutritional Services, Inc.
Recalls & Warnings
September 28, 2022
FDA Warns Muscle Sports for Joint Health, Immune & Workout Supplement, Vitamin C, Elderberry, and Other Claims
On September 23, 2022, the FDA issued a warning letter to Muscle Sports Products, LLC following inspection of the company’s websites which found statements about company products, including Join Revolution Capsules, IMMUNITY + Powder, Rhino Rampage PUMPED Capsules, Attack Pre-Workout ...
Recalls & Warnings
April 04, 2013
Three More Sexual Enhancement Supplements Found To Contain Undeclared Drugs
On April 3, 2013, the FDA warned consumers that the sexual enhancement supplements AFFIRM XL, Love Rider and Ninja Mojo were found to contain undeclared erectile dysfunction drugs. Consumers are urged to stop using these supplements immediately.
Recalls & Warnings
February 06, 2013
Vitamin and Supplement Maker Warned For Labeling Errors, Manufacturing Violations
On January 25, 2013, the FDA issued a warning letter to NX Generation Ltd.
News Release
January 19, 2007
Consumers warned of problems with multivitamins — ConsumerLab.com uncovers defects in over half of products tested
WHITE PLAINS, NEW YORK — JANUARY 19, 2007 — Fifty-two percent of multivitamins recently selected for testing by ConsumerLab.com were found to be contaminated with lead, unable properly break apart, or to contain significantly more or less ingredient than claimed.
News Release
August 01, 2006
ConsumerLab.com evaluates cholesterol-lowering supplements — Test results available for over 90 products; Review of nine popular ingredients
WHITE PLAINS, NY — AUGUST 1, 2006 — ConsumerLab.com has released a major new review of dietary supplements used to improve cholesterol and triglyceride levels.
News Release
March 30, 2005
ConsumerLab.com finds most B-vitamins of high quality but three lacking in ingredients — Test Results for 41 Products Reported Along with Information on Use
WHITE PLAINS, NY — MARCH 30, 2005 — ConsumerLab.com reported test results today for B vitamin supplements that it recently purchased in the U.S. and Canada.
News Release
May 21, 2004
Consumers warned of pitfalls with some multivitamins and vitamin waters — Testing by ConsumerLab.com uncovers problems with many brands
WHITE PLAINS, NY — FRIDAY MAY 21, 2004 — (Updated June 2, 2004) — ConsumerLab.com reported the results today of a major new analysis of popular multivitamin products.
News Release
July 31, 2003
ConsumerLab.com finds many cholesterol-lowering supplements poorly made — Test results published online today
WHITE PLAINS, NY — July 31, 2003 — ConsumerLab.com reported today that more than half of the cholesterol-lowering supplements that it recently purchased failed to contain their listed ingredients and/or could not adequately break apart to release their contents.
News Release
January 08, 2002
ConsumerLab.com finds most B vitamin supplements contain what they claim, but often exceed safe levels — Consumers cautioned to be aware of side effects with high dose products
WHITE PLAINS, NY — January 8, 2002 — ConsumerLab.com announced today that all but one of the twenty-one products analyzed in its B Vitamin Product Review contained the claimed amounts of B vitamins.
Recalls & Warnings
February 19, 2014
Seller of Sexual Enhancement Supplements Warned For Manufacturing Violations
On February 11, 2014, the FDA issued a warning letter to Maximus Niterider International Group, Inc.
News Release
February 14, 2001
Problems found with multivitamins and multiminerals by ConsumerLab.com
WHITE PLAINS, NY — February 14, 2001 — ConsumerLab.com announced today that only 14 of 27 products evaluated in its Multivitamin and Multimineral Product Review achieved full "CL Approved Quality" status.
Recalls & Warnings
March 01, 2013
Manufacturer of Joint, Weight Loss, Muscle Supplements and More Warned for Adulteration, Misbranding and Drug Claims
On February 4, 2013, the FDA issued a warning letter to DC Nutrition, Inc.
Recalls & Warnings
April 29, 2014
Seller of B Vitamins, CoQ10, Amino Acids and Other Supplements Warned for Manufacturing Violations and Drug Claims
On April 1, 2014, the FDA issued a warning letter to Bio-Recovery, Inc.
Recalls & Warnings
May 14, 2014
Maker of Mood, Smoking Cessation Supplements and More Warned for Violations, Drug Claims
On April 17, 2014, the FDA issued a warning letter to CDJ Holding, Incorporated, d.b.a.
Recalls & Warnings
November 06, 2014
Seller of Cholesterol, Arthritis Supplements and More Warned for Drug Claims
On October 17, 2014, the FDA issued a warning letter to Vitamins Direct (USA) and Golden Pride, Inc., which distribute Flexezy and Physician's Signature brands of dietary supplements, following a facility inspection which found statements made about certain supplements to be drug claims.
Recalls & Warnings
February 15, 2013
Energy Drink Recalled Due To Bacterial Contamination
On December 21, 2012, NBTY issued a voluntary recall of the energy supplement MET-Rx Extreme Thermo Rage Watermelon 8 fl. oz. (Manufactured by MET-Rx Nutrition, Inc.) due to bacterial contamination.
Recalls & Warnings
October 22, 2010
Enzyte "Male" Supplement Found to Affect Heart
The journal Archives of Internal Medicine (August 2010) includes a report of a small clinical trial of the dietary supplement Enzyte, which is marketed for "male enhancement."
Recalls & Warnings
August 28, 2013
Maker of Sexual Enhancement Supplement Warned for Manufacturing Violations
On July 11, 2013, the FDA issued a warning letter to Precise Nutrition International Inc.
Recalls & Warnings
December 05, 2015
FDA Warns Companies Selling Products Containing Picamilon
On November 30, 2015, the FDA issued warning letters to five supplement companies selling products containing picamilon, which is not a lawful dietary supplement ingredient in the U.S.
Recalls & Warnings
October 27, 2004
Some Supplements Can Damage Eyes At High Doses and with Topical Use
As reported by Reuters Health on October 21, 2004, an article in the current issue of the American Journal of Ophthalmology suggests that some herbal remedies and nutritional supplements can damage the eyes.
Recalls & Warnings
May 10, 2013
Seller Of Sexual Enhancement and Hormonal Balance Supplements Warned For Manufacturing Violations
On April 26, 2013, the FDA issued a warning letter to Pristine Bay, L.L.C.
Recalls & Warnings
April 18, 2013
Cardio, Energy and Sexual Enhancement Supplement Distributor Warned For Manufacturing Violations and Drug Claims
On December 21, 2012, the FDA issued a warning letter to ForMor Inc, dba ForMor International, following a facility inspection which found the company's Cardio Cocktail and Argenix dietary supplements to be adulterated because because they were prepared, packed, or held under conditions that do ...
Recalls & Warnings
January 16, 2018
Adverse Effects From Energy Drinks Common Among Youth and Young Adults
More than half (55.4%) of young people who have ever consumed an energy drink have experienced at least one adverse reaction, according to study published yesterday in CMAJ Open, a journal of the Canadian Medical Association.
Recalls & Warnings
April 04, 2017
Seller of B Vitamins, Vitamin C, Potassium & More Warned for Manufacturing Violations
On March 24, 2017 the FDA issued a warning letter to The Sanapac Company, Inc.
Recalls & Warnings
January 17, 2017
Seller of Heart, Senior and Teen Supplements Warned For Drug Claims
On December 7, 2016, the FDA issued a warning letter to Esteem Products Ltd following a review of the company's website, which found statements made about its products, Cardio Life, Total Man, Total Woman, Senior Total Man, Senior Total Woman , and Total Teen to be drug ...
Recalls & Warnings
November 26, 2019
FDA Warns Companies Selling CBD Products as Dietary Supplements
On November 25, 2019, the FDA issued warning letters to 15 companies for selling products containing CBD (cannabidiol) labeled and marketed as dietary supplements, and/or for making drug claims about these products.
Recalls & Warnings
September 05, 2014
Seller of "Nerve", "Cleanse" and Probiotic Supplements Warned for Drug Claims
On July 30, 2014, the FDA issued a warning letter to Plexus Worldwide, Inc., following a review of the company's website and product labels, which found statements made about Fast Relief, BioCleanse and ProBio5 to be drug claims.
Recalls & Warnings
October 28, 2015
GNC Accused of Selling Supplements with Unlawful Ingredients
On October 22, 2015, Oregon Attorney General Ellen Rosenblum filed a lawsuit against supplement retailer GNC, alleging that the company sold products that were adulterated with BMPEA and picamilon, which are not lawful dietary supplement ingredients.
Recalls & Warnings
February 13, 2018
American College of Sports Medicine Warns of Energy Drink Dangers
A new statement released by the American College of Sports Medicine (ACSM) highlights the dangers of energy drinks when consumed by children and adolescents, and calls for more studies on the safety and efficacy energy drinks.
Recalls & Warnings
February 13, 2019
Supplements Promoted for Alzheimer's Disease and Dementia Sell "False Hope," Warns FDA
On February 11, 2019, the FDA warned consumers to beware supplements promoted to prevent or treat Alzheimer's disease or dementia.
Recalls & Warnings
December 26, 2017
Seller of BrainAlert Warned for Manufacturing Violations, Drug Claims
On December 14, 2017, the FDA issued a warning letter to BrainAlert, LLC.
Recalls & Warnings
December 26, 2012
Seller of Blood Sugar, Depression and Sleep Supplements Warned For Making Drug Claims
On October 15, 2012, the FDA issued a warning letter to BioNeurix Corporation after statements found on the company's website, http://www.pharma-tree.com, were found to promote the dietary supplements Blood Sugar 360, Amoryn, Seredyn, and Mellodyn as drugs.
