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Product Reviews (30)

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CL Answers (55)

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Clinical Updates (59)

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10/23/2011

Hoodia Fails for Weight Loss

For several years, hoodia has been a popular ingredient in weight loss supplements -- despite a lack of evidence. The first significant study of hoodia was just published. It showed no weight loss benefit compared to placebo. Worse, those who got hoodia experienced more side effects. See our Hoodia Review Article for details and information about hoodia. More >>
9/25/2011

Green Tea Extract and Weight Loss

A new study using a high dose of green tea extract showed it to help sedentary overweight men lose weight, while those taking placebo gained weight. This is not the first study to show this potential benefit of green tea extract. The effect may be due to the compound EGCG. Get the facts, including how much EGCG was in the product, in the Weight Loss Supplements Review.  More >>
3/06/2018

Do Probiotics Affect Weight?

Studies have shown some probiotics to help somewhat with weight loss and/or slimming, while others have shown no effect. However, a recent study with a popular probiotic found that it increased weight. Get the details in the Weight and fat loss section of the Probiotic Supplements Review.
3/08/2022

Brazil Nuts for Weight Management?

Brazil nuts have been touted to improve weight loss. See if a recent study found that to be true in our article about the Health Effects of Brazil Nuts.
10/25/2014

Probiotics Reduce Cholesterol / Improve Liver Function

Adding probiotic organisms to yogurt appeared to reduce LDL ("bad") cholesterol in a study of people with nonalcoholic fatty liver disease, a common condition. Levels of liver enzymes also improved and more weight loss occurred when people ate the probiotic yogurt, in contrast to those who ate regular yogurt. The probiotic organisms used in this study are found in several products recently tested by ConsumerLab.com. See the details in the Probiotic Supplements Review >> 
7/24/2021

Vitamin D and Pregnancy Outcomes

Can taking vitamin D during pregnancy reduce the risk of preterm labor, low birth weight or pregnancy loss? Find out what a recent study showed in the Pregnancy section of our Vitamin D Supplements Review. Also, see our Top Picks among vitamin D supplement.
5/25/2021

Does Creatine Cause Hair Loss?

Find out if creatine supplements cause hair loss. See the Concerns and Cautions section of our Muscle & Workout Supplements Review. Also, see our Top Picks for creatine supplements.
12/02/2020

Vitamin D and Hearing Loss

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.
10/06/2013

Vitamin D for Post-Menopausal Women

A study compared the effects of low-dose and high-dose vitamin D on bone mineral density in post-menopausal women who were also supplemented with calcium. Both dosages helped prevent loss of bone mineral density, but the higher dose was less efficient in reducing bone turnover, i.e., bone loss, contrary to what the researchers expected.  For details, including dosage, see the updated Vitamin D Supplements Review>>
9/02/2017

Extra Virgin Olive Oil Aids Fat Loss

A study among overweight women found that substituting extra virgin olive oil for another plant oil led to greater losses of body fat during dieting. See the details in the "What It Does" section of the Extra Virgin Olive Oils Review -- which includes our Top Picks among extra virgin olive oils.
9/15/2020

Preventing Muscle Loss with Leucine?

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.
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.
4/22/2022

Rosemary for Hair Loss?

Does applying rosemary oil to the scalp reverse male pattern baldness? Find out what research shows in our updated answer about hair loss supplements.

2/23/2022

Leucine for Muscle Loss?

Did leucine supplementation improve physical function in people ages 70 and older with age-related muscle loss in a recent study? Find out in the Branched-chain amino acids (BCAAs) section of our Muscle & Workout Supplements Review.

Also see our answer to the question: Which vitamins and minerals should someone over 70 take?

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.

3/29/2014

Vitamin D for Weight?

A study of overweight women who were dieting and exercising found that taking vitamin D did not increase the amount of weight they lost. Those attaining the highest blood levels of vitamin D did lose more weight than other women, but this may not have been due to vitamin D. For details about the study, information about other uses of vitamin D, and our tests of vitamin D supplements, see the updated Vitamin D Supplements Review >> 
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.)
12/06/2020

Yacon Syrup for Weight Management?

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?
6/08/2021

Melatonin & Weight

Can melatonin supplementation improve sleep or reduce weight? See what a new study among nightshift workers found in the What It Does section of the Melatonin Supplements Review. Also see our Top Picks for melatonin.
12/03/2021

Peanuts for Obesity?

Can eating peanuts help manage weight, or reduce blood pressure and cholesterol levels? Find out what a recent study found in our updated answer about Supplements and Weight Management.
7/31/2021

Gynostemma for Weight?

Can taking Gynostemma pentaphyllum extract help reduce weight? We've added information about this to our article about Gynostemma (which is also promoted for diabetes and high cholesterol treatment).
7/01/2012

Does Vitamin D Help Manage Weight?

If you've been reading our recent newsletters, many reports are being published about the effects of vitamin D. Here's one more: People with higher levels of vitamin D tend to put on less weight than people with lower levels. See the details in the update to the Vitamin D Supplements ReviewMore >>
2/26/2012

CLA For Weight Management

A new study in obese individuals found that taking a supplement with CLA (conjugated linoleic acid) for twelve weeks reduced body fat and, to a lesser degree, body weight. But CLA has other metabolic effects that need to be considered. See the update to the CLA Supplements Review which has details on dosage and potential side effects, as well as our product tests. More >>
3/09/2011

Fish Oil Helps in Chemotherapy

A recent study in lung cancer patients showed that those using fish oil supplementation during initial chemotherapy tended to maintain their muscle and total weight while those who did not lost 5 lbs of weight on average (2.2 lbs of which was muscle). See the Fish Oil (Omega-3) Product Review for more details, including the dosage used. More >>
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 >>
10/27/2015

Prebiotic Helps With Weight

A certain prebiotic was found to increase the amount of weight men and women lost while on a calorie-restricted diet. For details, including brand and dosage, plus our tests of popular probiotics and prebiotics, see the Probiotic Supplements Review >>
3/13/2018

Apple Cider Vinegar for Decreasing Appetite & Weight

Apple cider vinegar is often promoted for decreasing appetite and weight, but there have been few studies to show whether it works. Find out what a new study found in the Apple Cider Vinegar Review >> (Also see our Top Picks among products).
6/18/2014

Does Green Tea Really Help With Weight?

A new study found that a popular green tea extract did not cause a reduction in weight compared to placebo, despite the fact that some previous studies have shown a benefit. Get more details, including which green tea extract was used, in the update to the Green Tea Supplements, Drinks and Teas Review >>   
6/03/2015

Green Tea for Weight Control?

Many studies have looked at whether green tea can help with weight management. The results have been mixed. A recently published study used a high-dose green tea extract. Although the researchers concluded it worked, a closer look suggests otherwise, and points to a potential risk. For details, as well as the results of our tests of green tea supplements, beverages, and brewable green tea, see the Green Tea Review >>
7/11/2015

Green Tea for Weight Management?

Green tea has been touted for weight management, but a recent study with a green tea extract casts doubt. More details are found in the "What It Does" section of the Green Tea Review >>
7/28/2020

Can Alpha-Lipoic Acid Lower Weight?

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.
7/14/2020

Coconut Oil for Lowering Weight and Cholesterol?

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.
2/13/2017

Probiotics and Weight?

Several studies, including a recent one in Brazil, suggest that probiotics can help with weight reduction or other aspects of slimming. The studies published to-date, however, have limitations. For more details, see the "What It Does" section of the Probiotics Supplements Review (which includes our tests of products) >>
11/04/2018

Curcumin for Weight?

Can curcumin help you lose body weight? Find out what a new review concluded in the What It Does section of the Curcumin and Turmeric Supplements Review. (Also see our Top Picks for curcumin and turmeric supplements.)
10/10/2020

Ginger for Weight Management?

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.
6/02/2013

Don't Drink Too Much Tea!

After publication of our Green Tea Review last month, a CL member emailed us about the potential danger of getting too much fluoride from tea. Although this won't happen from just a few cups of tea daily, there have been recent cases where habitually drinking extremely large amounts of tea has caused "fluorosis" causing bone pain and even tooth loss. See the warning (and our tests of green tea products) in the updated Green Tea Review >>
5/27/2013

Alzheimer's Changes Slowed with B Vitamins

A combination of B vitamins was found to slow brain loss in areas of the brain associated with Alzheimer's disease. This same combination of vitamins has also been shown to slow cognitive decline. Get the details on who may (or may not) benefit, dosage, plus test results for over 35 B vitamin supplements in the updated B Vitamin Supplements Product Review >>
9/29/2013

When Vitamin D Doesn't Help

A recent study in postmenopausal women in New York showed that taking a vitamin D supplement did not reduce bone loss (based on measurements of markers of bone turnover). However, calcium supplementation did appear to help. Why? It all has to do with how much vitamin D and calcium the women were already getting without the supplements. You can find out the amounts and get more details in the update to the Vitamin D Supplements Review >>
11/10/2013

Amino Acids Speed Recovery From Knee Surgery

A study of men and women receiving knee replacement surgery showed that taking essential amino acids (including branched-chain amino acids) twice daily before and after surgery reduced muscle loss and speeded recovery. For details, including dosage, plus our reviews of amino acid supplements, see the updated Muscle Enhancers Review >> 
9/16/2015

Soy Isoflavones Maintain Bone Calcium

A new study showed that soy isoflavones can reduce loss of calcium from bones in postmenopausal women. Certain formulations were more effective than others, although none was as effective as drug therapy. For details, see the Menopause Supplements Review >>
6/07/2015

Melatonin Increases Bone Density

Research has begun to suggest that melatonin may have a positive effect on the skeleton. The latest study shows that giving post-menopausal women with bone loss daily melatonin causes small, but significant improvements in bone density. Details, including dosage, as well as our tests of melatonin supplements, are found in the Melatonin Supplements Review >>
5/31/2015

Probiotic May Aid Fat Loss

A recent study in overweight men and women showed a small decrease in fat among those taking a probiotic for 12 weeks. Other small studies have shown similar benefits using different probiotics. More details, along with our reviews of probiotics containing organisms similar to those in these studies, are found in the Probiotic Supplements Review >>
4/04/2017

Curcumin for Muscle Soreness?

Several studies have evaluated curcumin to reduce muscle soreness, pain, and loss of power after exercise. The most recent study showed little benefit. For details, see the "What It Does" section of the new Turmeric/Curcumin Supplements & Spices Review >>
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).
4/30/2016

Probiotic for Fat Loss

A new study found that a probiotic decreased body fat in overweight adults, without diet or exercise. The probiotic in the study differs from many on the market in an interesting way. Get more information about this and other studies with probiotics, as well as our tests of products, in the Probiotic Supplements Review >>
3/29/2017

Vitamin E/Selenium & Alzheimer's

A long-term study among men in the U.S. found that giving high doses of vitamin E and/or selenium did not significantly affect their risk of developing dementia. The study was part of a larger study which found that these supplements increased the risk of prostate cancer, type 2 diabetes, hair loss, and dermatitis. For details, see the "Alzheimer's disease/dementia" section of the Selenium Supplements Review >>
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 >>
9/15/2020

Too Much Vitamin D Bad for Bone?

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.
1/12/2019

Maintaining Muscle With Fish Oil?

Can taking fish oil prevent muscle loss when a limb is immobilized, such as in a brace? Find out what a recent study showed in the "Strength and Muscle" section of the Fish Oil Supplements Review. (Also see our Top Picks for fish oil.)
11/26/2017

Signs of B12 Deficiency

B12 deficiency is not uncommon, most often affecting older people. Symptoms include anemia, fatigue, tingling in the arms and legs and loss of balance -- but a recent case report highlights a lesser-known sign of B12 deficiency. Find out more, plus how much B12 you should get in the "B12" section of the B Vitamins Review >> (Also see our Top Picks for vitamin B12 and other B vitamins.)
10/22/2019

Should Women Take Calcium?

Do women reduce bone loss and the risk of fractures if they take a calcium supplement? See what a recent study showed in the What It Does section of the Calcium Supplements Review. Also see our Top Picks for calcium supplements.
6/23/2018

Probiotics for Bones

Can taking a daily probiotic help reduce bone loss? Find out what a year-long study showed in the Bone density and fractures section of the Probiotic Supplements Review. (Also see our Top Picks among probiotic supplements.)
1/25/2020

Best Way to Cook With Olive Oil

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.
4/14/2020

A Food to Slow Cognitive Decline?

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.
10/05/2021

Silica for Dental Implant Inflammation?

Can a form of silica typically promoted for hair, skin, nail and bone health also help reduce inflammation and bone loss around dental implants? See what a recent study found in our updated article about Silica Supplements.
1/11/2022

Supplement for Thinning Hair?

A reader asked if taking Hair La Vie Clinical Formula can help with thinning hair. Find out in our updated article about Supplements for Hair Loss.
2/25/2022

HMB for Muscle Loss in Older People?

Can HMB supplementation improve muscle mass and strength in older people? Find out what research suggests, including who is most likely to benefit, in the HMB section of our Muscle & Workout Supplements Review.
3/11/2022

How Vitamin A Deficiency Can Affect the Eyes

Vitamin A deficiency was linked to eye floaters and loss of peripheral vision in a recently reported case. Get the details, and learn about other symptoms of vitamin A deficiency, in the What It Does section of our Vitamin A Supplements Review. Also see our Top Picks among vitamin A supplements.

See our answer to the question: Do any supplements help prevent or reduce eye floaters?

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