Liquid B-12 is a complete B-Complex formula that is high in Vitamin B-12. B Vitamins are often found together because, although each works independently of the others, they often function together in common metabolic pathways.* For example, most of the B Vitamins are involved in energy production pathways.* In addition, Vitamin B-12 and Folic Acid are both essential for the synthesis of DNA during cell division and therefore are important for rapidly multiplying cells, such as blood cells.* This formula contains 5, 000 mcg of B-12 in three different forms to optimize its utilization.