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[8] [9] Fungi are grown industrially to enable ergosterol extraction and preparation as a powder for sale as a vitamin D 2 dietary supplement and food additive. [ 10 ] Preparations of irradiated ergosterol containing a mixture of previtamin and vitamin D 2 were called viosterol in the 1930s.
7-Dehydrocholesterol (7-DHC) is a zoosterol that functions in the serum as a cholesterol precursor, and is photochemically converted to vitamin D 3 in the skin, therefore functioning as provitamin-D 3. The presence of this compound in human skin enables humans to manufacture vitamin D 3 (cholecalciferol).
In humans there are 13 vitamins: 4 fat-soluble (A, D, E, and K) and 9 water-soluble (8 B vitamins and vitamin C). Water-soluble vitamins dissolve easily in water and, in general, are readily excreted from the body, to the degree that urinary output is a strong predictor of vitamin consumption. [ 47 ]
Vitamin D is a group of structurally related, fat-soluble compounds responsible for increasing intestinal absorption of calcium, magnesium, and phosphate, along with numerous other biological functions. [1] [2] In humans, the most important compounds within this group are vitamin D 3 (cholecalciferol) and vitamin D 2 (ergocalciferol). [2] [3]
8 Vitamins for Hair Growth and Restoration That Actually Work, Per Experts and Reviewers. Shanon Maglente, Madeleine Haase. July 17, 2024 at 4:08 PM.
Vitamin B 8: adenosine monophosphate (AMP), also known as adenylic acid. [38] Vitamin B 8 may also refer to inositol. [39] Vitamin B 10: para-aminobenzoic acid (pABA or PABA), a chemical component of the folate molecule produced by plants and bacteria, and found in many foods.
A 1940s lithograph produced by the UK Ministry of Food illustrating the Vitamin C content of various foods. The early years of the 20th century were summarized by Kenneth John Carpenter in his Short History of Nutritional Science as "the vitamin era". [3] The first vitamin was isolated and chemically defined in 1926 .
Humans require thirteen vitamins in their diet, most of which are actually groups of related molecules (e.g. vitamin E includes tocopherols and tocotrienols): [20] vitamins A, C, D, E, K, thiamine (B 1), riboflavin (B 2), niacin (B 3), pantothenic acid (B 5), pyridoxine (B 6), biotin (B 7), folate (B 9), and cobalamin (B 12). The requirement ...