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%.

Mahsulot nomi:	12-VITAMIN
CAS:	68-19-9
MF:	C63H88CoN14O14P
MW:	1355.37
EINECS:	200-680-0
Qisqacha VB12 deb nomlangan, shuningdek, kobalamin deb ham ataladigan va B vitaminlaridan biri bo'lgan B12 vitamini kobalt Korrin sinfini o'z ichiga olgan murakkab organik birikmalar sinfidir va uchburchakli kobaltni xuddi shu porfirin Korrin tekisligida halqaning markazida joylashgan .Bu kashf etilgan eng katta va eng murakkab vitamin molekulasi. Bundan tashqari, bu metall ionli yagona vitamin. Kristall qizil, u qizil vitamin deb ham ataladi, o'simlik tarkibida VB12 mavjud emas va VB12 hosil qila olmaydi. Jigar VB12 ni, so'ngra sut, go'sht, tuxum, baliq va boshqalarni eng yaxshi manbai bo'lib, VB12 RNK va DNK sintezidagi ajralmas koenzimdir. In Vivo jonli ravishda VB12 etishmasligi asab tizimida, masalan, periferik asab va markaziy asab tizimida patologik o'zgarishlarni keltirib chiqarishi mumkin.