A vitamin is a compound necessary for the metabolism of an organism, in the sense that “being a subject will develop deficiency diseases and signs of abnormal metabolism, and restore the missing component to prevent or cure diseases and make the normal metabolism “[B 1]. The fact that a vitamin is a compound distinguishes eg minerals, and necessity means that it can not be synthesized. The bodies are capable of various syntheses, the name vitamin is related to the organism. Thus, vitamin C can be synthesized by most animals from glucose, and is therefore regarded as a vitamin for the inability of this species such as synthetic humans and other species of the taxon Haplorrhini, bats -mice or guinea pigs [B 2]. The reason for this deficiency in humans comes from the inactivity of the gene responsible for the enzyme L-gulonolactone oxidase, necessary for synthesis from glucose, on chromosome 8.
Vitamin C is found in vegetables and fruits such as kiwi (105.4 mg per 100 g) or cantaloupe (36.7 mg per 100 g) [A 1]. Vegetables and fresh fruits and raw are the best source, since the vitamin C decreases sharply with age or cutting, and cooking strongly in
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