home care health: Vitamin D3 - Vitamin D3 1000 IU by Country Life

A vitamin is an organic molecule (or a set of molecules contiguously joined chemically, i.e. vitamers) that is an vital micronutrient which an organism needs in small quantities for the proper functional of its metabolism. critical nutrients cannot be synthesized in the organism, either at every or not in plenty 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 put in the three additional groups of valuable nutrients: minerals, indispensable fatty acids, and essential amino acids. Most vitamins are not single molecules, but groups of partnered 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 competently 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 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, amendable mineral metabolism for bones and additional organs. The B rarefied vitamins feint as enzyme cofactors (coenzymes) or the precursors for them. Vitamins C and E bill 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 complete so.

Before 1935, the forlorn source of vitamins was from food. If intake of vitamins was lacking, the consequences was vitamin nonappearance and consequent nonattendance 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 lump production and marketing of vitamin supplements, including multivitamins, to prevent vitamin deficiencies in the general population. Governments mandated accessory of vitamins to staple foods such as flour or milk, referred to as food fortification, to prevent deficiencies. Recommendations for folic mordant supplementation during pregnancy abbreviated 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 highbrow of micronutrients necessary to life, every of which he presumed to be amines. once this presumption was forward-thinking definite not to be true, the "e" was dropped from the name. all vitamins were discovered (identified) together with 1913 and 1948.

Natrol: Natrol Vitamin D3 Maximum Strength, Bone & Joint Health, 10,000 IU, Tablets, 60ct