A vitamin is an organic molecule (or a set of molecules closely combined chemically, i.e. vitamers) that is an vital micronutrient which an organism needs in small quantities for the proper practicing of its metabolism. critical nutrients cannot be synthesized in the organism, either at every or not in acceptable quantities, and appropriately 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 intensify the three new groups of valuable nutrients: minerals, vital fatty acids, and vital amino acids. Most vitamins are not single molecules, but groups of associated 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 other 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 pointed 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 mass and differentiation. Vitamin D provides a hormone-like function, variable mineral metabolism for bones and extra organs. The B puzzling vitamins acquit yourself as enzyme cofactors (coenzymes) or the precursors for them. Vitamins C and E put-on 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 do so.
Before 1935, the by yourself source of vitamins was from food. If intake of vitamins was lacking, the consequences was vitamin nonappearance and consequent nonappearance diseases. Then, commercially produced tablets of yeast-extract vitamin B profound and semi-synthetic vitamin C became available.
This was followed in the 1950s by the growth production and publicity 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 caustic supplementation during pregnancy shortened 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 forlorn a highbrow of micronutrients vital to life, all of which he presumed to be amines. subsequently this presumption was later definite not to be true, the "e" was dropped from the name. all vitamins were discovered (identified) amid 1913 and 1948.
4 Things to Know About Vitamin D and Multiple Sclerosis - Multiple Sclerosis News Today
4 Things to Know About Vitamin D and Multiple Sclerosis - Multiple Sclerosis News Today
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