Wellgreen Cas 13422-55-4 Pharmaceutical Grade 99% Methylcobalamin Vitamin B12 Powder
Vitamin B12, referred to as VB12, also known as cobalamin, one of the B vitamins, is a kind of cobalt-containing corrin complex organic compounds, the trivalent cobalt contained is located in the center of the porphyrin-like corona ring plane. It is the largest and most complex vitamin molecule that has been found so far, and it is also the only vitamin that contains metal ions; its crystals are red, so it is also called red vitamin.