In the News - Press Coverage     Testimonials     Press Releases

Round-up of Recent Product Tests by

— Results for B Vitamin Supplements & Energy Drinks, Garlic, NAC (N-acetyl cysteine), Iron and Omega-7 Fatty Acids —
White Plains, New York, December 9, 2014 — In recent months, has published test results for a variety of popular supplements, including B vitamins supplements and energy drinks, NAC (N-acetyl cysteine), iron and garlic. In addition, reported levels of omega-7 fatty acids, which are not typically listed on labels but are commonly found in fish oil and other omega-3 fatty acid supplements. The results were often surprising.

Tests of popular B vitamin supplements, complexes and energy drinks, for example, revealed that many B-complexes and energy drinks contained the wrong amounts of vitamins, often containing much more than listed. While certain B vitamins may help to lower homocysteine levels and slow declines in memory and cognition, excessive amounts can have adverse effects. Tests of selected energy drinks also revealed the actual amount of caffeine provided by each -- a small bottle of one contained more than twice the caffeine expected from a regular cup of coffee.

Similarly, tests of garlic supplements, commonly taken to lower cholesterol and high blood pressure, uncovered a number of problems. In fact, 40% of products selected for testing failed to pass quality criteria. One contained less than half the amount of a key phytochemical associated with effective garlic. Two others failed to break apart properly in disintegration testing, and one product did not list its amount of garlic -- an FDA requirement. Interestingly, one "super strength" garlic supplement was actually one of the lowest in strength — other products were as much as 10 times as strong. also purchased and tested NAC (N-acetyl cysteine) supplements, which can help reduce the severity of flu symptoms and frequency of flare-ups of chronic bronchitis, and may be beneficial for a number of other conditions, such as Sjogren's syndrome, renal failure, schizophrenia, and polycystic ovary disease. However, among the products tested, found that suggested daily doses ranged from just 500 mg to 1,800 mg — making it critical to know the dose needed for a specific use. Additionally, found it could be easy to overspend on these supplements, with the cost to obtain an equivalent dose of NAC ranging from just 9 cents to 70 cents.

Wide variations in price were also found among iron supplements tested by, with the cost to get 25 mg of iron from selected products ranging from just two cents to over two dollars. Testing for contamination found one product exceeded limits for lead. Iron is required to prevent and treat iron-deficiency anemia, and even mild iron deficiency may cause fatigue and impair learning, memory, and sports performance. also expanded its Review of Fish Oil and Omega-3 Fatty Acid Supplements to include amounts of omega-7 fatty acids found in popular supplements. Preliminary evidence suggests that palmitoleic acid, the most common omega-7 fatty acid, may play a role in insulin sensitivity and lipid metabolism. Although found in some fish oil supplements, amounts of omega-7s are rarely listed on labels. Yet tests found popular fish oil and omega-3 fatty acid supplements contained as much as 500 mg of palmitoleic acid per daily serving. is a leading provider of consumer information and independent evaluations of products that affect health and nutrition. Membership to is available online, providing immediate access to independent reviews of more than 1,000 products. The company is privately held and based in Westchester, New York. It has no ownership from, or interest in, companies that manufacture, distribute, or sell consumer products. is affiliated with, an evaluator of online pharmacies, and, which reviews and rates Medicare Part D plans.

— END —

back to top



Coronavirus Information Center
Coronavirus Information Center
Answers to Critical Questions About COVID-19.

Product Reviews

In addition to our product reviews our encyclopedia covers the following:

Herbs & Supplements


Drug Interactions

Alternative Therapies



Follow us on...
facebook twitter
Join |  Sign In
Join Us on Facebook! Join Us on Instagram! Join Us on Twitter! Join Us on YouTube! Join Us on YouTube!
Product Reviews
Brands Tested
Health Conditions
CL Answers
Clinical Updates
Recalls & Warnings
Recommended Intakes
Where to Buy Products
Testing Program
How Products Were Tested
Quality Certification Program
Join CL Today
Join Free Newsletter
Group Subscriptions
Gift Membership
About Us
The CL Seal
CL Survey
Privacy Policy
Contact Us/Help

©2020, LLC. All rights reserved. A single copy of a report may be printed for personal use by the subscriber. It is otherwise unlawful to print, download, store or distribute content from this site without permission. name and flask logo are both registered trademarks of, LLC. This site is intended for informational purposes only and not to provide medical advice.