Vitamin B12, also known as cobalamin, is an essential water-soluble vitamin that plays a crucial role in the functioning of the brain and nervous system and in the formation of red blood cells. It is a key player in DNA synthesis and energy production. Vitamin B12 is naturally found in animal products, including fish, meat, poultry, eggs, milk, and milk products. Fortified cereals are also a source of B12 for vegetarians and vegans.
