Vitamin K refers to a group of liposoluble vitamins that play an important role in blood clotting, bone metabolism and regulation of calcium levels. Its role in the coagulation process (germ. Koagulation – hence the K) was first observed by the Danish scientist, Henrik Dam, in 1929, while its chemical structure was discovered by Edward Adelbert Doisy in 1943. Still, it was not until 1974 that the exact function of vitamin K in the body was recognized.
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