1/25/2022

Eggs and Heart Risk

Does eating one or two eggs daily increase the risk of heart attack? Find out what recent studies suggest in the Concerns and Cautions section of our Choline Supplements Review (eggs contain choline). Also see our Top Picks among choline supplements.

5/08/2021

Eggs, Choline, & Heart Risk

The choline in eggs can raise levels of TMAO, a compound associated with higher risk of heart attack. A recent study compared the effects of eating eggs versus taking choline supplements on TMAO levels. Find out which increased TMAO levels the most. Also, see our Top Pick among choline supplements.

5/10/2024

Eggs and Risk of Death

A recent study found that eating more than a certain number of eggs (a source of choline) daily carried an increased risk of death among people with a history of heart disease or stroke. Get the details in the Concerns and Cautions section of our Choline Supplements Review.

5/29/2024

Eggs for Alzheimer’s

Weekly consumption of a modest number of eggs, which are a good source of choline, was associated with a dramatic reduction in risk of Alzheimer’s disease, according to a recent study. Choline supplements may also be helpful. Get the details in the Alzheimer's section of our Choline Supplements Review, which includes our Top Picks among choline supplements.

12/23/2020

Eggs and Heart Disease Risk

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.

12/09/2012

Extra Protein Improves Strength

Whether you are trying to add muscle or just maintain it, a new report suggests that additional protein leads to further gains from resistance-type training. The analysis of 22 clinical studies shows that both young and old individuals who received additional protein from supplements or high-protein foods experienced significantly greater increases in muscle mass and strength than those not getting additional protein. Get the details, as well as our tests and reviews of protein powders and drinks, in the updated Protein Powders and Drinks Review (Including Sports, Nutrition, and Diet Products). More >>

10/23/2021

How Good Is Pea Protein?

How does the amino acid quality and digestibility of pea protein compare to casein? Find out what a new study showed in the ConsumerTips section of our Protein Supplements Review, which also explains the differences between whey, soy, rice, and other sources of protein. Also see our Top Picks among protein powders, including our Top Pick for pea protein.

1/11/2022

Soy Versus Whey Protein

Can soy protein help increase muscle mass and strength as well as the same amount of whey protein? See what a recent study showed in the Soy section of our Protein Powders and Drinks Review, which includes comparisons of whey, casein, soy, rice, pea and other forms of protein. Also see our Top Picks among protein supplements.

1/28/2015

Pea Protein for Muscle

Like whey protein, pea protein is now being used in protein powders. A recent placebo-controlled study compared the two and suggests that pea protein is a viable option for increasing muscle mass. See the details in the Protein Supplements Review >> 

9/25/2018

Extra Protein for Extra Muscle?

Extra protein can boost the increases in muscle strength and size that occur with strength training. But does extra protein help people already consuming adequate protein from their diets? See what a new study found in the What It Does section of the Protein Supplements Review. (Also see our Top Picks among protein powders and shakes.)

3/21/2020

When to Eat Protein

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.

6/27/2021

Whey vs Rice and Potato Protein

Whey, rice and potato proteins were found to have different effects on blood sugar and insulin levels in a recent study. Find out how they differ. You can also learn more about these and other protein sources in the ConsumerTips section of our Protein Powders, Shakes and Drinks Review. Also see our Top Picks among protein powders.

10/27/2020

Protein During Dialysis?

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.

7/02/2017

Extra Protein Enhances Training

Even among untrained, middle-aged men, adding protein supplementation to resistance training leads to greater improvements in lean body mass (i.e., more muscle) than the training alone, according to a new study. Find out how much protein helped in the "What It Does" section of the Protein Supplements Review. The Review includes our test-based, quality ratings and comparisons of popular protein powders and drinks.

9/28/2019

Who's Not Getting Enough Protein?

A recent study among older Americans identified groups that are not getting enough protein. Find out who's not getting enough protein in the What It Does section of the Protein Powders and Drinks Review. Also see our Top Picks among protein products.

4/29/2018

When to Take Protein

When is the best time of day to take a protein supplement if you want to gain muscle but lose fat? An analysis of over 30 clinical studies involving protein supplementation and resistance exercise recently addressed this question. Get the answer and details in the ConsumerTips section of the Protein Powders, Shakes and Drinks Review. (Also see our Top Picks among protein products).

3/20/2018

Does Extra Protein Help?

What effect does giving older men a daily protein supplement and/or a weekly testosterone shot have? Find out in the What It Does section of the Protein Powders, Shakes, and Drinks Review. The section also provides information about the effects of extra protein in other populations. (Also see our Top Picks among protein supplements.)

4/21/2020

Does Protein Powder Affect Blood Flow?

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.

1/07/2020

When to Eat Protein

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.

1/15/2019

Pea vs. Whey Protein

Which is better for increasing strength and muscle thickness, pea protein or whey protein? See what a recent study showed in the Protein Powders Review. Also see our Top Pick for each type of protein.

2/02/2019

Whey Protein When Bedridden?

Does substituting whey protein for other sources of protein help bedridden people retain muscle mass and strength? Find out what a new study showed in the What It Does section of the Protein Powders & Drinks Review. Also see our Top Picks for protein powders.

2/23/2019

Allergic Reactions to Protein Powder

Be aware that allergic reactions to protein powders have recently been reported in people not normally allergic the protein sources of their supplements. For details, see the Concerns and Cautions section of the Protein Powders, Shakes, and Drinks Review. Also see our Top Picks for protein supplements.

10/27/2015

Whey Protein and Muscle

As noted in our Protein Review, many studies show that extra protein can help build more muscle and increase strength when resistance training. But, as shown in a recent study in postmenopausal women, just eating extra protein without exercise provides no benefit. Get the details in the Protein Powders and Drinks Review >>

2/10/2016

Extra Protein Helps During Exercise & Dieting

A study among obese young men found that giving extra protein during a period of dieting and intense exercise caused them to lose more fat and gain more muscle than men to whom additional protein was not provided. Several other recent studies in both young and old individuals have shown significant benefits from additional protein – but only when combined with exercise. Get the details in the Protein Powders and Drinks Review >>

4/14/2023

When to Get Protein

For older people, a new study suggests that the timing of protein intake during the day may be important, although more research is needed. Get the details in the When to take section of our Protein Powders and Shakes Review. Also find out when to take protein around exercise for greater metabolic improvement and fat loss.

See our Top Pick among protein powders.

6/30/2023

Protein Powder vs. Bar

Is protein better absorbed from a drink made from protein powder or a protein bar? Find out what a recent study showed in the What It Does section of our Nutrition Bars Review.

Also see our Top Picks among protein powders and drinks and Top Picks among nutrition bars.

9/19/2023

Protein After Hospitalization

Does a protein drink like Ensure Protein help with recovery after hospitalization? See what a study showed in the Recovery section of our Protein Review, which includes our Top Picks among protein powders and drinks.

2/28/2023

Vegan Protein for Muscle?

Can vegan protein derived from fungus (sold as Quorn) improve muscle mass and strength as effectively as milk-based protein, and is it safe? Find out in the ConsumerTips section of our Protein Powders and Shakes Review.

Also see our Top Picks among protein powders, including a product suitable for vegans.

3/04/2022

Whey Protein From a Lab

Laboratory-produced whey protein is now hitting the market. How does it differ from milk-based whey protein? Find out in the ConsumerTips section of our Protein Supplements Review. Also, see our Top Picks among protein powders, shakes and drinks.

12/15/2023

Cricket Protein and Kidneys

Cricket protein may be more environmentally friendly than animal sources of protein, but people with impaired kidney function may want to avoid consuming large amounts. Learn why in the Cautions and Concerns section of our Protein Supplements Review. Also see what we found when we tested cricket powders, and see our Top Picks for whey, soy, and other protein shakes and drinks.

1/19/2024

How to Store Protein Powder

Learn how to properly store protein powders in the ConsumerTips section of our Protein Supplements Review, which includes our Top Picks among protein powders.

1/13/2025

Protein Powder Contamination

Recent tests of protein powders by a separate group showed that certain forms of protein were more likely than others to be contaminated with lead and cadmium. For details, see our Protein Powders Review, which includes our Top Picks for protein powders and shakes.

12/19/2024

Protein Supplements & Constipation

Protein powders and supplements may cause constipation and other gastrointestinal side effects in some people, but there are steps you can take to avoid these side effects. For details, see the Cautions and Concerns section of our Protein Supplements Review, which includes our Top Picks among protein supplements.

9/06/2024

Protein When Training

Does getting extra protein while participating in resistance training improve body composition and strength better than resistance training alone? Find out what a recent study found in the Building and maintaining muscle mass section of our Protein Powders, Shakes, and Meal Replacements Review, which includes our Top Picks among protein supplements.

11/04/2024

Can you get too much protein?

Proteins provide essential amino acids, but some evidence suggests that getting high amounts of two specific amino acids from foods may increase the risk of heart disease. Learn how to limit exposure to these amino acids in our article: What’s the Best Way to Get High-Quality Protein from Food?

Also see our Top Picks in our Protein Powders Review.

1/23/2024

Is Protein Powder Ultra-Processed?

All protein powders can be considered ultra-processed food, which has pros and cons, as discussed in our Protein Powders Review. Also see our Top Picks among protein powders and shakes.

3/01/2024

Heart Concern With High Protein?

Too much protein from a single meal might pose cardiovascular risk according to a preliminary study. For details, see the Concerns and Cautions section of our Protein Powders and Shakes Review, which includes our Top Picks among protein products.

2/03/2025

Protein for Older People?

Does supplementing with protein lead to greater muscular benefits in older people involved in resistance training? See what a recent review of studies concluded in the Building and maintaining muscle mass section of our Protein Supplements Review, which includes our Top Picks among protein powders, shakes, and drinks.

Also see: Best Supplements to Prevent Age-Related Muscle Loss

2/07/2023

Whey Protein for Diabetes

Whey protein seems to help control blood sugar levels, and a recent study suggested that it may do more than just slow gastric emptying and increase insulin levels. Get the details in the Diabetes section of our Protein Powders and Shakes Review. Also see our Top Picks for whey protein.

3/28/2023

Protein For Faster Improvement?

Did taking a protein supplement lead to faster improvement in walking speed among older men and women than exercise alone? Find out what a recent study showed in the Building and maintaining muscle mass section of our Protein Supplements Review.

Also see our Top Pick among protein supplements (including whey, casein, pea, and soy).

11/01/2022

Protein & Nutrition Bars -- Watch Out for Weight Gain

Protein and nutrition bars can be a convenient way to get protein, fiber, and other nutrients, but they can lead to weight gain according to a recent study. The details are in our Protein and Nutrition Bars Review.

6/23/2023

Non-animal Whey

How do “non-animal” whey protein products such as V-Whey and Mooless compare to regular whey protein, and are they suitable for people sensitive to lactose or with milk allergies? Find out in our Protein Powders Review.

Also see our Top Picks among protein powders.

3/01/2022

Does Boosting Protein Intake Help?

Can getting extra protein boost physical function or improve body composition in older people? See what a recent study showed in the Building and maintaining muscle mass section of our Protein Supplements Review. Also see our Top Picks among protein supplements.

3/04/2022

Protein Shake for Weight Management?

Can drinking a protein and fiber shake improve weight management in overweight people when used along with diet and exercise? Find out what a recent study found in the Weight management section of our Protein Supplements Review. Also see our Top Picks among protein powders, shakes and drinks.

12/09/2018

When to Take Protein

Supplementing with protein can increase muscle mass and strength more than resistance exercise alone, but the timing of protein consumption can make a difference if you are also trying to improve metabolism and reduce body fat. Get the details and find out what a new study showed in the What It Does section of the Protein Powders, Shakes & Drinks Review. (Also see our Top Picks among products).

8/27/2019

Whey Protein for Muscle Gain and Fat Loss?

Did drinking whey protein after resistance exercise help prevent muscle loss and reduce body fat in obese women? See what a recent study found in the Building and maintaining muscle section of the Protein Powders, Shakes and Drinks Review. Also see our Top Picks for protein powders and shakes.

6/17/2020

Whey vs. Casein vs. Neither

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.

1/12/2020

Collagen vs. Whey for Muscle

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.

2/07/2018

Does Protein Hurt Bones?

It has been speculated that high-protein diets can result in calcium loss from bone. A recent study tested this. Get the results in the Concerns and Cautions section of the Protein Powders Review -- which also discusses a concern with dehydration. (If you use protein powders, see our Top Picks).

5/20/2018

Protein for Exercisers

What happens when you give extra protein to women who regularly perform resistance exercise? Extra good things, according to a recent study. See the details (including dosage) in the What It Does section of the Protein Powders, Shakes, and Drinks Review. (Also see our Top Picks among protein products).

2/27/2019

Many Men and Women Not Getting Enough Protein

A national study found that many older men and women don't get enough protein in their diets, including those in their 50s. For details, see the What It Does section of the Protein Powders and Drinks Review. Also see our Top Picks among protein supplements.

10/05/2019

Extra Protein During Chemotherapy?

Is taking extra whey protein during chemotherapy helpful to malnourished cancer patients? Learn what a study found in the What It Does section of the Protein Powders, Shakes, and Drinks Review. Also see our Top Picks among protein powders.

11/19/2019

When Protein Won't Help

Supplementing with protein can help build and maintain muscle mass, but there are times when it won't help, as demonstrated in a recent study. For details see the Building and maintaining muscle mass section of the Protein Powders Review. Also see our Top Picks for protein supplements.

2/10/2018

Protein Enhances Muscle Gain in Young and Old

Consuming extra protein, up to a point, was found to help both younger and older people increase muscle strength and size as part of resistance exercise training. For details see the What It Does section of the Protein Powders Review. (Also see our Top Picks among protein powders).

8/18/2018

Extra Protein Can Help Older People

Increasing protein intake can help older people maintain and build muscle — but it's not that simple. Get the details, and read about the latest studies, in the Building and maintaining muscle mass section of the Protein Supplements Review. (Also see our Top Picks among protein shakes and drinks).

7/12/2014

Whey Protein for Blood Sugar Control?

Drinking a whey protein shake before a meal improves blood sugar and insulin response in men and women with type 2 diabetes, according to a new, preliminary study. Get more details, plus our tests of protein supplements, in the updated Protein Powders and Drinks Review >>

10/06/2020

Can Whey Protein Control Hunger?

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.

11/30/2021

Nutrients In Jeopardy With a Plant-Based Diet?

Which nutrients are in jeopardy when one switches from animal to plant-based proteins? Find out what a recent study showed in the Concerns and Cautions section of our Protein Supplements Review. Also see our Top Picks among protein supplements.

6/08/2016

Whey Protein Improves Recovery After Hip Fracture Surgery

Whey protein improved strength and the ability to perform certain activities of daily living in older adults who underwent surgery for hip fracture, according to a recent study. Get the details, including dosage, and more about other benefits, in the Protein Powders and Drinks Review >>

7/21/2013

Soy Protein to Prevent Prostate Cancer?

Prostate cancer occurs less frequently in parts of the world where people eat more soy. So researchers recently gave a soy protein drink, or a placebo drink, to men who previously had prostate cancer to see if it reduced the risk of the cancer recurring. Learn what they found in the updated Protein Powders and Drinks Review >>

1/05/2019

Is Protein Best Before or After a Meal?

A new study showed that the timing of protein supplementation around a meal can determine the effect on blood sugar in people with insulin resistance. Find out the best timing in the update to the Protein Powders, Drinks, and Shakes Review. (Also see our Top Picks among products.)

5/10/2022

Whey Protein & Blood Pressure

Older people may experience a dip in blood pressure after consuming whey protein, according to a recent study. Get the details in the Concerns and Cautions section of our Protein Powders, Shakes, and Drinks Review.

7/06/2022

Whey Protein & Blood Pressure

Whey protein may temporarily lower blood pressure. Find out if adding carbohydrates and fats reduces this effect in the Concerns and Cautions section of our Protein Supplements Review.

9/16/2022

Are Plant Proteins Enough?

A CL Member asked if plant-based proteins provide all the essential amino acids people must get from their diet. Find out in the Protein section of our article: Top 8 Supplements for Vegetarians and Vegans.

5/19/2023

Ka'Chava Superfood

We just tested Ka'Chava Superfood, a popular protein powder that also contains vitamins and minerals. See the results now in our Protein Powders and Shakes Review. Also see our Top Picks among protein supplements.

10/18/2022

High-Intensity Training + Protein?

High-intensity interval training (HIIT) is a popular way to work out, but does taking a protein supplement after HIIT increase muscular benefits? Find out what a recent study showed in the Building and maintaining muscle mass section of our Protein Powders and Shakes Review.

1/10/2023

Phytates in Pea Protein

Is pea protein powder is a significant source of the phytate, which can reduce mineral absorption? Find out what research suggests in the ConsumerTips section of our Protein Powders Review.

1/13/2023

How Much Phytate in Pea Protein?

Although not on the label, we found out how much phytate, an anti-nutrient, is in our Top Pick for pea protein powder. Learn the details and implications in our updated Protein Powders and Shakes Review.

4/07/2023

Collagen Versus Whey Protein?

Find out if taking collagen (which is a protein) improves wrinkles if you already use a protein powder, such as whey. Also, learn if collagen is as good as whey for muscle maintenance.

1/27/2024

BPA in Protein Powder?

Protein powders can absorb BPA (an endocrine disruptor) from plastic containers. Learn how to avoid BPA in the Quality Concerns section of our Protein Supplements Review.

8/05/2024

PerfectAmino for Muscles?

Is the essential amino acid product PerfectAmino better at making protein than other products because it includes DNA building blocks? Find out in our article about EAAs vs protein/protein supplements.

1/19/2024

Protein Powder Allergy?

It is possible to be allergic to a protein powder, and some potential allergens need not be disclosed as allergens on labels. Learn more in the Cautions and Concerns section of our Protein Powders & Shakes Review.

10/14/2024

Getting High-Quality Protein from Food

What is the best way to get high-quality protein from food rather than from supplements? Learn our answer in our article: Getting High Quality Protein from Food.

9/23/2024

Protein for Vegans

Is it helpful for vegans to incorporate processed foods, like tofu or protein powders, into their diets? See what recent study suggested in our article: Top 8 vitamins and nutrients for vegetarians and vegans.

Also see our Top Picks among protein supplements, including our Top Pick for vegans.

10/04/2022

Choline for Cognitive Function?

Did supplementing with egg powder, a source of choline, improve cognitive function in preadolescents? Find out what a recent study showed in the Memory and Cognition section of our Choline and Lecithin Supplements Review.

Also see our article about supplements and food for brain function.

7/26/2022

Phosphatidylcholine & Heart Risk?

Free choline can raise blood levels of TMAO, which has been linked with adverse health effects. But does phosphatidylcholine, a form of choline (and the main form in eggs), have similar effects on TMAO levels? Find out in our updated Answer to the question: Is there a danger in taking lecithin or phosphatidylcholine?

2/05/2012

Fish Oil During Pregnancy Reduces Allergy in Infants

Last year we reported important findings from a study of fish oil given to pregnant women. A further analysis of that study shows another benefit of daily fish oil for pregnant women -- their babies have nearly a 40% lower risk of egg allergies. A lower risk of eczema was also found, although this association did not hold after adjusting the data for certain factors. See the update to the Fish Oil Supplements Review, which includes details on this study, the type and amount of fish oil taken, and our latest product tests.

5/23/2023

Top Pick Protein Meal

With the addition of Ka'Chava to our Protein Powders Review, we compared it to six other products as a meal replacement. See which is our Top Pick.

10/21/2022

Novavax Booster

The FDA and CDC now allow the Novavax vaccine, which is protein-based rather than mRNA-based, as a booster. Find out who's eligible to get this booster in the Protein-based vaccine section of our article about COVID vaccines.

2/18/2022

Do Vitamin D & Whey Protein Help After a Stroke?

Can taking vitamin D and whey protein after a stroke help improve muscle strength and physical function? Find out what a recent study suggests in the Muscle, balance and falls section of our Vitamin D Supplements Review.

Also see our article about supplements and stroke risk.

9/28/2022

Plant Protein Pairings

What are the best combinations of plant-based foods to ensure proper intake of essential amino acids? Find out in the ConsumerTips section of our Protein Supplements Review.

12/20/2020

Probiotic for Protein Absorption?

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.

5/15/2018

Casein at Night?

It has been suggested that casein protein be taken at bedtime because it is absorbed relatively slowly, providing a more continuous supply of amino acids throughout the night to maintain muscle. A study recently put this theory to the test. See the results in the Casein section of the Protein Powders Review. Also see our Top Picks among products.

7/06/2019

Casein Peptides for Better Sleep?

People with difficulty sleeping were given a casein hydrolysate to see if it would help them sleep. Find out if it worked in the Casein section of the Protein Powders, Drinks and Shakes Review. Also see our Top Picks among casein and other protein products.

11/20/2018

Soy Can Affect Thyroid

Daily intake of soy isoflavones (as found in soy protein and soy isoflavone supplements) can affect thyroid hormone levels — even in people with normal thyroid function, according to a recent study. For details, see the "Concerns and Cautions" section of the Menopause Supplements Review and the Protein Supplements Review.

3/15/2024

Supplements & Acne

Be aware that supplementing with whey protein may increase the risk of acne in some people, as noted in the Concerns and Cautions section of our Protein Supplements Review, which includes our Top Picks among products.

Learn about the effects of other supplements on acne.

11/18/2024

Casein for Sleep?

Did Lactium, a branded casein, help people with insomnia fall asleep faster or improve sleep quality? See what a recent study found in the Casein section of the Protein Supplements Review, which includes our Top Picks among protein powders.

Also see: Which supplements and lifestyle changes improve sleep, and which cause insomnia?

11/14/2024

Hemp Seed Benefits?

What are hemp seeds and does eating them help with heart health, diabetes, or boosting testosterone? Find out in our article about the benefits, safety, and what to consider when picking a product.

Also see our test results for:

• Hemp protein
• Hemp seed oil
• Hemp milk
• Hemp extract

10/27/2023

Information to Avoid Counterfeits Added for 7 Brands

We've added information about how to safely purchase products from Bragg, Centrum, Gaia Herbs, Host Defense, Nutricost, Vital Proteins, and Vitamin Shoppe to our article about Where to Safely Buy Real Vitamins and Supplements. The list now covers 39 brands.

12/17/2021

Soy and Breast Swelling in Men?

Can soy milk, soy protein, or soy isoflavone supplements cause breast swelling in men? Find out in the Concerns and Cautions section of our Plant-Based Milks Reivew. Also, see our Top Picks for soy milk.

10/26/2021

Reducing Risk of Fractures & Falls With Milk, Cheese and Yogurt?

Can increasing calcium and protein intake from foods such as milk, cheese and yogurt reduce the risk of fractures and falls in older men and women? See what a new study found in the Bone Health and Fractures section of our Calcium Supplements Review.

4/14/2013

Concern Over Carnitine Causing Cardiovascular Disease

Intake of L-carnitine from supplements (and from red meat) may foster atherosclerosis (hardening of the arteries), according to new research. Once ingested, L-carnitine is converted in some people to a compound which reduces the normal clearing of cholesterol from arteries.

For more details, see the updated reviews of B Vitamin Supplements & Energy Drinks and Protein Powders, as some of these products contain L-carnitine. The Acetyl-L-Carnitine Supplements review has also been updated because acetyl-L-carnitine is chemically similar to L-carnitine, suggesting a potential concern.

4/20/2016

Diabetes Cured With Low Cal Diet

A recent study found that type 2 diabetes was reversed in 40% of people who followed an 8-week, very low calorie diet consisting mainly of a diet shake. Get details about the study in the "What It Does" section of the Protein Powders and Drinks Review – for Body Building, Sports & Dieting >>

10/24/2017

Vitamin D Toxicity

Getting too much vitamin D is associated with negative effects. With continued use of enormous doses of vitamin D, toxic effects can occur, as has been reported with the use of a protein supplement containing vitamin D. See the details in the "Concerns and Cautions" section of the Vitamin D Supplements Review >>

4/09/2019

Lunasin to Lower Cholesterol?

Can taking lunasin, a protein isolated from soy, help to lower LDL cholesterol and triglyceride levels? See what a new study found in our updated answer to the question: What is lunasin and does it really reduce cholesterol?

9/07/2022

Urolithin A for Muscle Strength?

Can supplementing with urolithin A improve strength and endurance in middle-aged women and men? Find out what a recent study showed in our updated CL Answer about urolithin A for age-related muscle decline.

Also see our answer to the question: What's the best protein to keep and gain muscle when you're older?

7/15/2022

Is Soy Good or Bad?

Are soy products such as soy isoflavones, soy protein, soy oil, and soy lecithin beneficial or harmful? Find out in our answer to the question: Is soy in supplements good or bad for you?

10/03/2023

Soy for Wrinkles?

Did taking soy protein with isoflavones reduce wrinkles, pigmentation, or dry skin in postmenopausal women? Find out what a recent study showed in the Soy section of our Menopause Supplements Review.

Also see our article about supplements for tightening skin as well as our Top Pick collagen supplement for skin.

1/24/2023

Exercise While Fasting

To build muscle and burn fat, some people exercise without having eaten since the prior day. Having some protein or amino acids around the time of exercise can help with building muscle – but what’s the best time to do that? Find out what research suggests, in our updated CL Answer about essential amino acids.

Also see: I do moderate exercise for about an hour a few times a week. Which supplements might help me?