Vitamin

A vitamin is an organic molecule (or a set of molecules to the side of similar chemically, i.e. vitamers) that is an vital micronutrient which an organism needs in little quantities for the proper effective of its metabolism. necessary nutrients cannot be synthesized in the organism, either at every or not in satisfactory 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 tote up the three other groups of necessary nutrients: minerals, indispensable fatty acids, and critical 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 without difficulty 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 prickly 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, flexible mineral metabolism for bones and new organs. The B rarefied vitamins pretense as enzyme cofactors (coenzymes) or the precursors for them. Vitamins C and E piece of legislation 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 abandoned source of vitamins was from food. If intake of vitamins was lacking, the consequences was vitamin nonexistence and consequent want diseases. Then, commercially produced tablets of yeast-extract vitamin B puzzling and semi-synthetic vitamin C became available.

This was followed in the 1950s by the mass 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 pointed 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 single-handedly a technical of micronutrients indispensable to life, all of which he presumed to be amines. later than this presumption was difficult sure not to be true, the "e" was dropped from the name. all vitamins were discovered (identified) amongst 1913 and 1948.

Why your kids might need more vitamin D