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Vitamin B-12 is an essential water-soluble vitamin that plays an important role in many functions in the body, including: DNA synthesis Energy production Nerve cell health Red blood cell formation Neurological function B-12 is present in many food sources (mainly animal-based), where it is bound to the protein molecules in that food
Always consult your healthcare professional before starting any injectable therapy
Despite being essential for life, we cannot produce B12 for ourselves
The molecular formula is C 63 H 88 CoN 14 O 14 P, which corresponds to a molecular weight of 1355.38 and the following structural formula: Cyanocobalamin occurs as dark red crystals or orthorhombic needles or crystalline red powder
Updated July 24, 2026 at 4:32 PM CDT For the latest stories on the science of healthy living, subscribe to NPR's Health newsletter