Coenzyme B12, also known as methylcobalamin, is a form of vitamin B12 that plays a crucial role in various biochemical processes in the body. It is essential for the production of red blood cells and the maintenance of the nervous system. Coenzyme B12 helps convert homocysteine into methionine, an amino acid important for protein synthesis and overall health. This coenzyme is primarily found in animal-based foods, such as meat, fish, eggs, and dairy products. Vegetarians and vegans may need to consider supplements or fortified foods to ensure adequate intake. A deficiency in coenzyme B12 can lead to anemia and neurological issues.