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What are the general characteristics of vitamins?
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What are the general characteristics of vitamins?
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Vitamins occur in plants, animals as well as microorganisms, i.e. it has widespread occurrence.
The plants and many microbes can synthesize all the vitamins, whereas only a few vitamins are synthesized in animals.
Human body
can synthesize some vitamins. For eg. Vitamin A from precursor carotene and Vitamin D from ultraviolet irradiation of 7-dehydrocholesterol. Some members of Vitamin B- complex are synthesized by micro-organisms present in the intestinal tract. Vitamin C is also synthesized in some animals such as rat.
All the cells of the body store vitamins to some extent.
Vitamins are partly destroyed and partly excreted.
Vitamins are non-antigenic.
Most of the vitamins are coenzymes, however few are haematopoietic.
Vitamins carry out functions in
very low concentration
; hence total daily requirement is very small.
Vitamins are effective when taken orally.
A lack of one or more vitamins (avitaminosis) leads to characteristic
deficiency symptoms
in humans as well as in animals.
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Lifeeasy Biology
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