Vitamin basics

The term "vitamin" comes from "vita" (meaning life) and "amine" (an organic, nitrogen-containing compound related to ammonia). Initially called "accessory factors," they are essential for life in trace amounts. All vitamins were originally thought to be amines, as was the case with thiamine, vitamin C (ascorbic acid) and several others that were among the first to be discovered. By the time it was clear that not all of these compounds were amines, the name "vitamin" had caught on.

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What to know about calcium

Consume a couple of servings a day of dairy, along with fruits and vegetables, to get enough of this bone-building mineral.
 

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