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WHITE PLAINS, NY — April 7, 2004 (updated May 4, 2004) — announced today that two of nine zinc pill or liquid supplements that it recently tested contained only 73% to 85% of the claimed amounts. Among 7 zinc lozenges, a form generally used to treat colds, all contained the claimed amount of zinc, but most lacked instructions on their proper use.

Modern diets leave some people mildly deficient in zinc. Pills or liquid supplements can correct deficiencies and may help prevent or treat a variety of conditions ranging from macular degeneration to acne. Zinc applied directly to the throat or nasal passage from a lozenge or gel may reduce the duration of a cold. found that labels on most zinc lozenges do not explain that zinc must be taken every 2 hours during the day to be effective against colds. As this results in high zinc intake (several times more than needed in the diet and enough to cause stomach discomfort), many manufacturers appear to leave the dosage up to consumers.

The Zinc Product Review is available at The Review lists results for 16 products of which selected 8 and 8 others were tested at the request of their manufacturers through's Voluntary Certification Program. The Review also provides information on how to best choose and use these supplements and safety information. Subscription is required for the full report. Reviews of many other popular supplements are available from online. New Reviews soon to be released include, multivitamins/multiminerals, St. John's wort, valerian, vitamin E, and omega-3 fatty acids from fish and marine oils. The recently published paperback,'s Guide to Buying Vitamins and Supplements: What's Really in the Bottle? is available in bookstores, online from or through 800-431-1579. is a leading provider of consumer information and independent evaluations of products that affect health and nutrition. The company is privately held and based in White Plains, 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. Subscription to is available online. For group subscriptions, Technical Reports, or product testing contact Lisa Sabin, Vice President for Business Development, at

Copyright, LLC, 2004. All rights reserved.

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