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Since 1999, has tested and provided ratings for vitamins and supplements for a wide range of brands, including those sold in health food stores, vitamin stores, pharmacies, supermarkets, mass merchandisers, discount clubs, catalogs, health care practitioner offices, through distributors in multi-level marketing companies, and on the Internet.

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The brands below have been tested and rated in Product Reviews conducted by, providing quality ratings and comparisons of hundreds of vitamins, supplements and other health products. Please note that the full product line for each brand below has not been tested. rotates through brands in selecting products to be evaluated in its Product Reviews. In addition to the products that it selects to be tested, allows manufacturers/distributors to request the testing of their own products for a fee through the Quality Certification Program. All such products are purchased on the market by and are not supplied by the manufacturer/distributor. These products undergo the same testing and evaluation as other products.