We constantly search for new sub- stances that can improve biologi- cal function or make us fitter and healthier. Recently Western society has turned to foods as sources of these en- hancers. These products are called, various- ly, vitamins, dietary supplements, function- al foods, "nutraceuticals," phytochemicals, biochemopreventatives, and designer foods. These terms vary in meaning from country To country, as does regulation of these Agents. Dietary supplements are ingredients Extraceted from foods, herbs, and plants that Are taken without further modification out- Side of foods, herbs, and plants that Hancing benefits.
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