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Recalls & Warnings (104)

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Clinical Updates (40)

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6/16/2013

Stimulant Supplements

Have you ever wondered what taking a stimulant supplement for weight management or energy might do to your body? Researchers recently gave Zantrex-3, Xenedrine EFX, Metabolift, or a brand of Guarana to young men while monitoring their heart rates and other vital signs, and recording side effects. The results raise concerns. Get the details, plus test results for 14 other supplements, in the updated Weight 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 >>
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.
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 >> 
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.
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 >>
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.
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.
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).
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.
4/21/2020

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.
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.)
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.
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).
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 >>
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.
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).
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.
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.
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.
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.)
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 >>
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.
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.
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.
11/13/2020

Do Meal Replacement Drinks Help Reduce Weight?

Do protein-based meal replacement drinks help reduce weight? See what a new study showed in the What It Does section of the Meal Replacement Powders and Shakes Review. Also see our Top Pick among these drinks and powders. (Also see our separate Review of Protein Powders & Drinks.)
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.

News Releases (25)

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