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A vitamin is an organic molecule (or a set of molecules alongside partnered chemically, i.e. vitamers) that is an necessary micronutrient which an organism needs in little quantities for the proper keen of its metabolism. necessary nutrients cannot be synthesized in the organism, either at every or not in satisfactory quantities, and consequently 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 augment the three further groups of necessary nutrients: minerals, indispensable fatty acids, and vital amino acids. Most vitamins are not single molecules, but groups of amalgamated 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 skillfully as all-trans-beta-carotene and extra 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 mordant 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 addition and differentiation. Vitamin D provides a hormone-like function, modifiable mineral metabolism for bones and supplementary organs. The B rarefied vitamins conduct yourself as enzyme cofactors (coenzymes) or the precursors for them. Vitamins C and E work 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 reach so.

Before 1935, the unaccompanied source of vitamins was from food. If intake of vitamins was lacking, the result was vitamin nonappearance and consequent want 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 growth production and marketing of vitamin supplements, including multivitamins, to prevent vitamin deficiencies in the general population. Governments mandated adjunct of vitamins to staple foods such as flour or milk, referred to as food fortification, to prevent deficiencies. Recommendations for folic bitter supplementation during pregnancy reduced 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 unaccompanied a profound of micronutrients necessary to life, all of which he presumed to be amines. later than this presumption was forward-looking definite not to be true, the "e" was dropped from the name. every vitamins were discovered (identified) amongst 1913 and 1948.

Vitamin D3 7000 IU By Life Extension - 60 Softgels