ActivMelt- Melts Fast, Flavor Lasts Since 1932 Innovative Quality Dietary Supplement ActivMelt Instant Dissolve Natural FlavorDiscussion: KAL B-12 Adenosylcobalamin ActivMelt micro tablets, bursting with natural strawberry flavor, melt quickly in the mouth and are designed for optimal absorption in the body. Adenosylcobalamin is a biologically active form of Vitamin B-12 and is the major form in cellular tissues stores in the mitochondria. Vegetarian.