Advanced B-12 Complex combines the two active, coenzymated forms of vitamin B-12 - methylcobalamin and adenosylcobalamin (dibencozide) - with folic acid. Vitamin B-12 is required for normal growth, cell reproduction, myelin and nucleoprotein synthesis, and the formation of red blood cells. Coenzyme supplementation bypasses the body's need to synthesize the active forms of vitamin B-12 from cyanocobalamin.