ConsumerLab.com uses JavaScript to provide the best possible experience for our content, but your browser has it disabled. Learn how to enable it here.

Search term may appear only in full report available to members. Join now for full access.

Product Review

CLA (Conjugated Linoleic Acid) Supplements Review (for Slimming)

Choose the Best CLA Supplement. Not All CLA Supplements Contain What You Expect.

CLA Supplements Reviewed by ConsumerLab.com

CL Answer

Are there supplements I should take, or take differently, when intermittent fasting?

Supplements that may help when intermittent fasting. Information about whey protein, CoQ10, magnesium and others, plus coffee, fiber and more.

News Release

April 30, 2026

Best Protein Powders & Shakes? ConsumerLab Finds 29% Have Inaccurate Labels

White Plains, NY, April 30, 2026 — Protein powders and ready-to-drink shakes are a convenient way to get more protein, but new testing by ConsumerLab.com shows that some consumers may also get more cholesterol, sodium, or sugar than they bargained for.

Clinical Update

7/12/2017

Fat Fish vs. Lean Fish

If you are trying to control your blood sugar, it turns out that your choice of fish can make a difference. Learn more in the "What It Does" section of the Fish Oil Supplements Review. The review includes our Top Picks among omega-3 supplements.

Clinical Update

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.

News Release

June 30, 2022

Best Protein Shakes & Drinks According to ConsumerLab Tests. Lead, Excess Sodium Found in Some

White Plains, New York, June 30, 2022 — Consumers may get more sodium, fat, calories, or even lead, than they bargained for from some protein supplements, according to recent ConsumerLab tests of over 20 popular protein powders and shakes.

News Release

September 11, 2019

Some Nutrition Bars Contain More Carbs and Less Fiber Than Listed, ConsumerLab Tests Reveal

White Plains, New York, September 11, 2019 — Nutrition bars and cookies are promoted as a convenient way to get protein, fiber and other nutrients on-the-go, but recent ConsumerLab tests of popular nutrition bars and cookies reveal that some contain more carbohydrates (as well as fat and ...

News Release

June 15, 2016

28% of Protein Powders and Drinks Fail ConsumerLab.com's Tests of Quality

White Plains, New York, June 15, 2016 — Protein powders and drinks can help build and maintain muscle when combined with exercise and can also help with blood sugar control. However, recent ConsumerLab.

News Release

June 11, 2013

31% of Protein Powders and Drinks Fail Tests by ConsumerLab.com

White Plains, New York — June 11, 2013 — What's really in a scoop of "protein powder"? sIn some products, a lot less protein or a lot more carbohydrates than you would expect, and perhaps even a serving of something you don't want -- lead. That's according to recent tests by ConsumerLab.

News Release

November 15, 2005

Testing by ConsumerLab.com identifies many problems with popular supplements for weight loss, slimming, and blood sugar control

Westchester, NY — November 15, 2005 — In a series of reports released today, ConsumerLab.com revealed test results for supplements used for weight loss, slimming, and blood sugar control. Among the twenty-three products that ConsumerLab.

Recalls & Warnings

July 14, 2022

FDA Warns Company Selling Supplements with Dangerous Steroid-like Substances

On July 6, 2022, the FDA issued a warning letter to Elite Supplement Center LLC and Elite Supplement Training Facility LLC for selling the following products labeled as containing steroid-like substances known as selective androgen receptor modulators (SARMs), which are not permitted in dietary ...

Recalls & Warnings

May 11, 2022

FDA Warns 10 Companies for Selling Workout Supplements With Dangerous Ingredients

On May 4, 2022, the FDA issued warning letters to 10 companies for selling products promoted for muscle building, fat burning and other uses that contain potentially dangerous ingredients not permitted in dietary supplements, including hordenine, higenamine, 5-alpha-hydroxy-laxogenin, and CBD.

Recalls & Warnings

January 24, 2020

Fat-Burning, Energy Supplement Linked to Heart Trouble

A 33-year-old woman in Australia developed cardiac ischemia (a lack of blood flow to the heart) after taking the "fat burning" supplement Alpha Lean-7, according to a recent report in the Journal of Sports Sciences.

Recalls & Warnings

April 27, 2018

Labrada LeanPro8 Protein Powders Recalled Due to Allergen Risk

On April 24, 2018, Labrada Nutrition issued a recall of certain lots of LeanPro8 protein powders because they may contain undeclared egg protein.

Recalls & Warnings

April 06, 2016

FDA Warns of Stimulant Methylsynephrine In Supplements

On March 31, 2016, the FDA issued warning letters to seven companies selling products containing methylsynephrine (also called p-hydroxyephedrine or Oxilofrine), a stimulant drug which is not permitted in dietary supplements in the U.S.

Recalls & Warnings

February 26, 2015

Weight Loss Supplement Found to Contain Multiple Drugs

On February 25, 2015, the FDA warned consumers not to buy or use weight loss supplement Lean Body Extreme because it was found to contain sibutramine, desmethyl sibutramine, phenolphthalein, and sildenafil.

Recalls & Warnings

April 09, 2014

Maker of Relaxation Drink Warned For Melatonin Ingredient

On March 27, 2014, the FDA issued a warning letter to Dewmar International BMC, Inc. following a review of the company's product packaging and labels, which found the "relaxation beverage" Lean Slow Motion ...

Recalls & Warnings

May 16, 2012

Reaction Nutrition Warned by FDA of Violations in Manufacturing and Promotion of Several Supplements

On May 8, 2012, the U.S. FDA warned Reaction Nutrition, L.L.C. of Carnegie, PA of violations of Current Good Manufacturing Practices for dietary supplements and of illegally promoting a supplement as a drug.

Recalls & Warnings

November 01, 2017

FDA Warns Sellers of Bodybuilding Supplements Containing Steroid-Like Substances

On October 23, 2017, the FDA issued warning letters to three supplement distributors because several of their bodybuilding products contain selective androgen receptor modulators (SARMs).

Recalls & Warnings

April 16, 2019

DMHA and Phenibut Are Not Permitted in Dietary Supplements, Warns FDA

On April 16, 2019, the FDA announced it has issued 11 warning letters to companies whose dietary supplement products contain the drugs DMHA or phenibut, and therefore are in violation of the law.

Recalls & Warnings

August 15, 2017

Protein Supplements Can Be Dangerous in People with Rare Genetic Disorder

It was recently reported by Yahoo Australian News (August 14, 2017) that a 25-year-old woman died after taking protein supplements and eating protein-rich foods such as lean meats and egg whites in preparation for a fitness competition.

Recalls & Warnings

February 04, 2017

Five Weight Loss Supplements Found to Contain Drugs

The FDA warned consumers not to buy or use the following weight loss supplements because they were found to contain undeclared drugs:

Recalls & Warnings

December 02, 2017

Tests Reveal Additional Concerns About SARMs

SARMs (selective androgen receptor modulators) are steroid-like substances often illegally marketed as dietary supplements or drugs and typically promoted for building lean muscle mass, as they can act as anabolic steroids. They include compounds such as Ostarine, LGD-4033, or Andarine.

Recalls & Warnings

February 13, 2014

Maker of Cholesterol and Workout Supplements Warned For Manufacturing Violations, Drug Claims and Unapproved Ingredient

On January 31, 2014, the FDA issued a warning letter to Exclusive Supplements Inc.

Recalls & Warnings

February 16, 2016

Work Out and Weight Supplements Contain Synthetic Amphetamine-Like Compound

On February 3, 2016, the FDA issued a warning letter to ATS Labs, LLC because labels for the company's work out and weight loss supplements CFI, Weapon-X Pre-Workout Extreme, and Lady Lean list a synthetic, amphetamine-like compound, 4-amino-2-methylpentane citrate (also called ...

Recalls & Warnings

November 28, 2006

FTC Targets Seller of Pills Promoted for Height, Weight, and Bone Improvement

On November 28, 2006, the Federal Trade Commission (FTC) announced that a Florida business and its owner, who marketed purported height-enhancing pills for kids and young adults, will pay $375,000 to settle charges that their advertising claims were deceptive.