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Quasi-vitamins

The Vitamins, Page: 523-589
2022
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Book Chapter Description

The vitamins were initially recognized as accessory factors or unidentified growth factors. The designation “vitamin” is specific to animal species, stage of development or production, and conditions of the physical environment and diet. That designation is biased in favor of dietary essentiality for humans. For example, choline and carnitine are vitamins for some species of animals, but not humans. Other substances may confer biological activity in humans and animals, although these substances do not result in frank deficiency disorders per se. These substances are referred to as conditionally essential nutrients (nutrients that are generated through normal metabolism in humans) or beneficial dietary bioactives. Conditionally essential nutrients for humans include choline, carnitine, myo -inositol, ubiquinols, and lipoic acid. Beneficial dietary bioactives include nonprovitamin A carotenoids and flavonoids.

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