ActivMelt Melts Fast, Flavor LastsInnovative QualitySince 1932Free of Gluten & SoyDietary Supplement1 DailyActivMelt Instant DissolveNatural FlavorVegetarianThis KAL B-12 ActivMelt supplement provides Dual-Action B-12 from Methylcobalamin & Adenosylcobalamin forms. The micro tablets melt quickly in the mouth and are designed for optimal absorption in the body. Natural raspberry and strawberry flavors are simply delicious. Methylcobalamin & Adenosylcobalamin are biologically active forms of Vitamin B-12. Methylcobalamin is prevalent in the blood and other fluids in the body. Adenosylcobalamin is the major form in cellular tissues stored in the mitochondria. They work synergistically together.