A vitamin is an organic molecule (or a set of molecules to the side of linked chemically, i.e. vitamers) that is an indispensable micronutrient which an organism needs in small quantities for the proper vigorous of its metabolism. critical nutrients cannot be synthesized in the organism, either at all or not in acceptable quantities, and so must be obtained through the diet. Vitamin C can be synthesized by some species but not by others; it is not a vitamin in the first instance but is in the second. The term vitamin does not put in the three other groups of valuable nutrients: minerals, indispensable fatty acids, and essential amino acids. Most vitamins are not single molecules, but groups of joined molecules called vitamers. For example, there are eight vitamers of vitamin E: four tocopherols and four tocotrienols. Some sources list fourteen vitamins, by including choline, but major health organizations list thirteen: vitamin A (as all-trans-retinol, all-trans-retinyl-esters, as well as all-trans-beta-carotene and supplementary provitamin A carotenoids), vitamin B1 (thiamine), vitamin B2 (riboflavin), vitamin B3 (niacin), vitamin B5 (pantothenic acid), vitamin B6 (pyridoxine), vitamin B7 (biotin), vitamin B9 (folic critical or folate), vitamin B12 (cobalamins), vitamin C (ascorbic acid), vitamin D (calciferols), vitamin E (tocopherols and tocotrienols), and vitamin K (phylloquinone and menaquinones).
Vitamins have diverse biochemical functions. Vitamin A acts as a regulator of cell and tissue lump and differentiation. Vitamin D provides a hormone-like function, amendable mineral metabolism for bones and further organs. The B profound vitamins perform as enzyme cofactors (coenzymes) or the precursors for them. Vitamins C and E enactment as antioxidants. Both deficient and excess intake of a vitamin can potentially cause clinically significant illness, although excess intake of water-soluble vitamins is less likely to pull off so.
Before 1935, the isolated source of vitamins was from food. If intake of vitamins was lacking, the consequences was vitamin want and consequent nonattendance diseases. Then, commercially produced tablets of yeast-extract vitamin B complex and semi-synthetic vitamin C became available.
This was followed in the 1950s by the lump production and marketing of vitamin supplements, including multivitamins, to prevent vitamin deficiencies in the general population. Governments mandated supplement of vitamins to staple foods such as flour or milk, referred to as food fortification, to prevent deficiencies. Recommendations for folic biting supplementation during pregnancy condensed risk of infant neural tube defects.
The term vitamin is derived from the word vitamine, which was coined in 1912 by Polish biochemist Casimir Funk, who deserted a obscure of micronutrients critical to life, all of which he presumed to be amines. following this presumption was difficult sure not to be true, the "e" was dropped from the name. every vitamins were discovered (identified) amongst 1913 and 1948.
Vitamin D-3 Powder (2000 IU per 1\/4 Tsp.) - 4 oz (113 Grams)
Vitamin D complex Forms of Vitamin D vitamin D1, Vitamin D2, Vitamin D3, Vitamin D4
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