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 …
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