Methylcobalamin (Vitamin B12) 1000 mcg Nuggets Vitamin B-12 is a naturally occurring B Complex vitaminthat promotes the health of the circulatory and nervous systems.? Eachnutrient in the B Vitamin Complex performs a unique role in maintaining propermetabolic functioning and is essential for well-being. Vitamin B-12 supportsenergy metabolism by working with enzymes involved in the breakdown ofnutrients, such as amino acids.? It is also vital for the normal formationof blood cells, and is involved in DNA synthesis and renewal.?