vitamin k defined in 1951 yearvitamin k - vitamin k;
vitamin k - Required as a vitamin by man, other mammals, and birds. Fat soluble. Deficiency causes proneness to haemorrhage, since the vitamin takes part in synthesis of prothrombin in liver. Various slightly different compounds have Vitamin K activity. Has been synthesized in water soluble form. Part of human requirements probably come from bacteria living in gut.
near vitamin k in Knolik
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