This convenient B12 Liquid 1,000 mcg per 1 ml serving. It supports red blood cell function, energy metabolism and neurological health. Recent research has indicated that methylcobalamin, the active form of vitamin B12, supports neurological function and nerve cell health. In studies, methylcobalamin has demonstrated the potential to support healthy cognitive and nerve function as well as memory and emotional well–being. Vitamin B12 is also an important cofactor for energy production and plays a role in immune system health and healthy homocysteine metabolism.