Vitamin B 12, also known as cobalt amine, is the only vitamin containing metal elements. In nature, vitamin B12 is synthesized by microorganisms. Higher animals and plants cannot make vitamin B12. Vitamin B12 is the only vitamin that requires the help of an intestinal secretion (endogenous factor) to be absorbed. Some people due to gastrointestinal abnormalities, lack of this endogenous factor, even if adequate dietary sources can also suffer from malignant anemia. There is basically no vitamin B12 in vegetable foods. It stays in the gut for a long time and takes about three hours (most water-soluble vitamins take only a few seconds) to be absorbed. Vitamin B 12's main physiological function is to participate in the production of bone marrow red blood cells, prevent malignant anemia, prevent brain nerve damage. Vitamin B 12 is one of the last B vitamins to be found so far. Vitamin B12 is a polycyclic compound containing 3 valent cobalt. Four reduced pyrrole rings are linked together to form a Golin macroring (similar to porphyrin), which is the core of vitamin B12 molecule. Therefore, compounds containing this ring are referred to as Golin-like. Vitamin B12 is a light red acicular crystal which is easily soluble in water and ethanol. It is most stable under the condition of weak acid pH 4.5 and 5.0, and decomposes in strong acid (pH < 2) or alkaline solution, which can be destroyed to some extent in the event of heat. But short time high temperature disinfection loss is small, encounter bright light or ultraviolet ray is easy to be destroyed. The loss of ordinary cooking process is about 30%.

Номи маҳсулот:	ВИТАМИН 12
CAS:	68-19-9
ВМ:	C63H88CoN14O14P
MW:	1355.37
EINECS:	200-680-0
Витамини B12, ки ба таври кӯтоҳ VB12 номида мешавад, бо номи кобаламин низ ном дорад ва яке аз витаминҳои B мебошад, як синфи пайвастагиҳои мураккаби органикӣ мебошад, ки синфи кобальти Корринро дар бар мегирад ва кобальти севалентӣ дар ҳамвории порфирини Коррин дар маркази ҳалқа мавҷуд аст .Ин бузургтарин ва мураккабтарин молекулаи витамини кашфшуда мебошад. Он инчунин ягона витамини дорои металлҳои ион мебошад. Кристалл сурх аст, онро витамини сурх низ меноманд, растанӣ VB12 надорад ва наметавонад VB12 ҳосил кунад. Ҷигар манбаи беҳтарини VB12, пас аз шир, гӯшт, тухм, моҳӣ ва ғайра мебошад.VB12 коэнзиме муҳим дар синтези РНК ва ДНК мебошад. Набудани VB12 in vivo метавонад тағироти патологиро дар системаи асаб, аз қабили асаби канорӣ ва системаи марказии асаб ба вуҷуд орад.