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Supplement sleuth.(Brief article)

Better Nutrition

| April 01, 2007 | Bushkin, Gary | COPYRIGHT 2007 PRIMEDIA Intertec, a PRIMEDIA Company. All Rights Reserved. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)Copyright

Q: Why do some vitamins and minerals like calcium come in so many forms?

A: Several factors influence a dietary supplement's form. In general, factors that determine the best form for a product include solubility, stability under heat, the ability to remain intact under the pressure of tablet-making, and the ease of disintegration in the stomach. Keep in mind that different forms of the same nutrient often have separate physical properties.

The source of vitamins, minerals or other nutrients is often an indication of quality. For instance, calcium, as calcium carbonate or oyster shell calcium, is less expensive, less bioavailable and oftentimes less effective than calcium citrate or other types of calcium.

Also, some vitamins have active and inactive forms. The body can use active ...

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