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CL Answer

Must I take amino acid supplements on an empty stomach? Can I take them with other amino acids or with food to help with swallowing capsules?

Find out if you should take amino acid pills on an empty stomach or with food in order to maximize absorption, and more about the best way to take amino acid supplements.

Amino Acids

Product Review

Green Tea Review: Tea Bags, Matcha Powders, and Supplements

Some green teas provide barely any green tea polyphenols, while some others are high strength. See the Test Results and Our Top Picks for Green Tea.

Green Tea Review 2024

CL Answer

Can beetroot juice improve my workout performance?

Find out if beetroot juice can help improve exercise endurance or performance, how it works, the clinical evidence, and cautions..'s answer explains.

Beetroot juice and exercise performance - glass of beetroot juice

CL Answer

Which supplements and foods reduce or increase the risk of kidney stones?

Find out which supplements, foods and beverages may increase or decrease the risk of kidney stones, including information about potassium, calcium, choline, turmeric and curcumin, vitamin C, as well as foods and beverages such as green tea, lemon juice, orange juice, cranberry juice, chocolate and almonds.

Supplements for Kidney Stones

News Release

September 27, 2012 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

November 29, 2011 identifies many quality melatonin sleep supplements, but prices range from 4 cents to over $1 for the same dose

White Plains, New York — November 29th, 2011 — Can melatonin help you sleep? "Melatonin supplements may help some people get to sleep sooner, particularly those with chronic sleeping problems, but don't just buy any supplement - they vary significantly in strength, dosage, and cost," ...

News Release

December 14, 2010

DHEA supplements, touted for anti-aging and strength, reviewed by Testing finds one brand with only 14.7% of labeled amount

WHITE PLAINS, NEW YORK — DECEMBER 14, 2010 — Recent tests of DHEA supplements showed that most products contained their claimed amounts of the controversial ingredient, but one provided only 14.7% of its listed amount, the testing company reported today.

News Release

October 07, 2009 finds that only two-thirds of alpha-lipoic acid supplements selected for testing pass quality review -- Anti-oxidant supplements helpful to diabetics

White Plains, New York — Wednesday, October 7, — Alpha-lipoic acid (also called lipoic acid) is a natural anti-oxidant that can help diabetics reduce symptoms of peripheral neuropathy and control blood sugar, among other uses. ConsumerLab.

News Release

March 10, 2009 reports deficiencies in some supplements containing calcium, vitamin D, or vitamin K -- Focus on bone health supplements and new uses for vitamins D and K

WHITE PLAINS, NEW YORK — MARCH 10, 2009 — In a large review of supplements relating to bone health, reported today that tests showed five products to provide only 52.5% to 89% of the listed amounts of calcium or vitamin K. ConsumerLab.

News Release

February 06, 2008

Consumers warned of lead in some turmeric supplements — Highest lead level ever reported by; Lack of active compound also a problem

WHITE PLAINS, NEW YORK — FEBRUARY 6, 2008 — Turmeric supplements have become popular in recent years but warned today that some products contain high amounts of lead. Recent tests found a popular brand to contain 18.

News Release

September 19, 2006

DHEA supplements, touted for anti-aging and strength, reviewed by — Testing finds one brand with 215% of the labeled amount

WHITE PLAINS, NEW YORK — SEPTEMBER 19, 2006 — New tests of supplements containing the hormone DHEA found most to contain their claimed amounts of the controversial ingredient, but one provided 215% of its stated amount, the testing company reported today.

News Release

March 29, 2006 reports on 29 popular melatonin sleep supplements

WESTCHESTER COUNTY, NEW YORK — MARCH 29, 2006 (UPDATED APRIL 7, 2006) — announced test results today from its new Product Review of Melatonin Supplements covering 29 products.

News Release

February 06, 2006 finds most prostate supplements have correct ingredients, but three fail testing — Results posted for 22 supplements containing saw palmetto and beta-sitosterol

WESTCHESTER COUNTY, NEW YORK — FEBRUARY 6, 2006 — announced test results today from its new Product Review of Prostate Supplements.

Recalls & Warnings

May 17, 2007

Recall of Shark Cartilage Due to Potential Contamination

On May 16, 2007, NBTY, Inc.