|MadSci Network: Other|
Vitamins were originally classified according to their solubility in water or fats; they were also classified alphabetically as more and more were discovered. The fat soluble vitamins are A, D, E, and K, the rest being water soluble. Vitamin K was identified in 1934 by the Danish biochemist Henrik Dam, who won the Nobel prize, together with E. A. Doisy, in 1943 for their discovery of Vitamin K. This vitamin is essential to the clotting of blood. Published originally in the German literature-Koagulations-Vitamin, thus Vitamin K. This later discovered vitamin was not consistant with the continued alphabetic listing of all vitamins. There was a group of substances which decreased blood capillary fragility, called the vitamin P group. They are no longer considered to be vitamins. See Albert von Haller, The Vitamin Hunters (1962). All the vitamins differ in structure, there being no chemical grouping common to them all. Casimir Funk merely coined the name "vitamines" to emphasize that they are essential to life.
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