Vitamin
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Vitamins are organic molecules that are essential to an organism in small quantities for proper metabolic function. These essential nutrients cannot be synthesized in the organism in sufficient quanti
A bottle of B-complex vitamin pills
Calcium combined with vitamin D (as calciferol) supplement tablets with fillers.
Vitamin B12
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Vitamin B12, also known as cobalamin or extrinsic factor, is a water-soluble vitamin involved in metabolism. One of eight B vitamins, it serves as a vital cofactor in DNA synthesis and both fatty acid
Vitamin
…Vitamin B9 (folic acid and folates) Vitamin B12 (cobalamins) Vitamin C (ascorbic acid and ascorbates…
A vitamin B12 solution (hydroxocobalamin) in a multi-dose bottle, with a single dose drawn up into a syringe for injection. Preparations are usually bright red.
A blister pack of 500 μg methylcobalamin tablets
Methylcobalamin (shown) is a form of vitamin B12. Physically it resembles the other forms of vitamin B12, occurring as dark red crystals that freely form cherry-colored transparent solutions in water.
Structure of human TCII in complex with Vitamin B12. HC and IF show homologous protein folds.