The methylcobalamin in UNIQUE B-12 SUBLINGUAL is a much better source of B-12 than cyanocabalamin. Before the body can use cyanocabalamin it must be converted by the liver to methylcobalamin and a lot of B-12 is lost in the conversion process when using cyanocobalamin B-12. UNIQUE B-12 SUBLINGUAL B-12, B-6, Folic Acid and Biotin was created to bypass the digestive system, providing an infusion of B vitamin directly into the bloodstream.