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Research Author: ConsumerLab.com Last Updated: Sep 7, 2017 - 10:11:17 PM



Review of Magnesium Supplements Shows One-Quarter Fail Quality Tests

By ConsumerLab.com
May 19, 2009 - 10:01:04 AM



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(HealthNewsDigest.com) - WHITE PLAINS, NEW YORK — ConsumerLab.com reported today that among twelve magnesium supplements selected for testing, only nine met quality standards. One supplement contained only 45.4% of its labeled amount of magnesium, despite boasting a "GMP" (Good Manufacturing Practices) seal on its label. The same problem was found when ConsumerLab.com tested the product in 2007. Another supplement provided only 28.8% of its promised magnesium. Lead contamination was discovered in a third product.

According to Nutrition Business Journal, U.S. sales of magnesium supplements reached $271 million in 2007, up 13% from the year before. Magnesium supplements can help prevent migraine headaches, menstrual pain, and magnesium deficiency. Certain forms of magnesium are key ingredients in popular laxatives.

ConsumerLab.com’s review of magnesium supplements is available at www.consumerlab.com/results/magnesium_supplements_review/magnesium/. It includes findings for the twelve products selected by ConsumerLab.com as well as for seven that passed ConsumerLab.com's Voluntary Certification Program. Also listed are two products similar to ones that passed but sold under different brand names. Included are products from Blaine, Doctor’s Best, Equaline, Floradix, GNLD Nutritionals, Life Extension, Nature Made, Nature’s Bounty, New Chapter, Nutricology, Peter Gillham’s Natural Vitality, Pioneer, Puritan’s Pride, Slow-Mag, Solgar, Thorne Research, Total Nutrition, Tropical Oasis, Twinlab, and Vitamin World.

The report also provides magnesium supplement comparisons, magnesium supplement ratings on quality, and information regarding the proper selection and use of magnesium supplements, including differences among the chemical forms such as magnesium citrate, magnesium gluconate, magnesium hydroxide, magnesium oxide, and amino acid chelates.

ConsumerLab.com is a leading provider of consumer information and independent evaluations of products that affect health and nutrition. Reviews of popular types of vitamins, supplements, and generic drugs are available at www.consumerlab.com. Soon to be released are new Product Reviews of Joint Supplements for humans and animals (Glucosamine, Chondroitin and MSM) as well as those of Weight Loss and Slimming Supplements (including Chromium, CLA, 7-Keto DHEA). Subscription to ConsumerLab.com is available online. 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.

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