| vitamin K5 | 4-amino-2-methyl-1-naphthol;an antihemorrhagic vitamin. (05 Mar 2000) |
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| vitamin P | A mixture of bioflavonoids extracted from plants (especially citrus fruits). It reduces the permeability and fragility of capillaries and is useful in the treatment of certain cases of purpura that are resistant to vitamin C therapy. See: hesperidin, quercetin, rutin. Synonym: capillary permeability factor, citrin, permeability vitamin. (05 Mar 2000) |
| vitamin PP | A precursor of NAD, that is a product of the oxidation of nicotine. (18 Nov 1997) |
| vitamin u | <chemical> A vitamin found in green vegetables. It is used in the treatment of peptic ulcers, colitis, and gastritis and has an effect on secretory, acid-forming, and enzymatic functions of the intestinal tract. Pharmacological action: anti-ulcer agents, gastrointestinal agents. Chemical name: Sulfonium, (3-amino-3-carboxypropyl)dimethyl-, chloride, (S)- (12 Dec 1998) |
| vitamins | For the various vitamins see Vitamins. The word vitamin was coined in 1911 by the warsaw-born biochemist casimir funk (1884-1967). at the lister institute in london, funk isolated a substance that prevented nerve inflammation (neuritis) in chickens raised on a diet deficient in that substance. He named the substance vitamine because he believed it was necessary to life and it was a chemical amine. The e at the end was later removed when it was recognised that vitamins need not be amines. The letters (a, b, c and so on) were assigned to the vitamins in the order of their discovery. The one exception was vitamin k which was assigned its k from koagulation by the danish researcher henrik dam. (12 Dec 1998) |