we have eight types of vitamin b.
how many types of vitamin b do we have?
eight
vitamin b is one of eight b vitamins; it is the largest and most structurally complex vitamin. it consists of a class of chemically related compounds (vitamers), all of which show physiological activity. it contains the biochemically rare element cobalt (chemical symbol co) positioned in the center of a corrin ring. the only organisms to produce vitamin b are certain bacteria, and archaea. some of these bacteria are found in the soil around the grasses that ruminants eat; they are taken into the animal, proliferate, form part of their gut flora, and continue to produce vitamin b.
vitamin b12
a vitamin is an organic molecule (or related set of molecules) that is an essential micronutrient that an organism needs in small quantities for the proper functioning of its metabolism. essential nutrients cannot be synthesized in the organism, either at all or not in sufficient quantities, and therefore 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 include the three other groups of essential nutrients: minerals, essential fatty acids, and essential amino acids. most vitamins are not single molecules, but groups of related molecules called vitamers. for example, vitamin e consists of four tocopherols and four tocotrienols. the thirteen vitamins required by human metabolism are: vitamin a (as all-"trans"-retinol, all-"trans"-retinyl-esters, as well as all-"trans"-beta-carotene and other provitamin a carotenoids), vitamin b (thiamine), vitamin b (riboflavin), vitamin b (niacin), vitamin b (pantothenic acid), vitamin b (pyridoxine), vitamin b (biotin), vitamin b (folic acid or folate), vitamin b (cobalamins), vitamin c (ascorbic acid), vitamin d (calciferols), vitamin e (tocopherols and tocotrienols), and vitamin k (quinones).
vitamin