ActivMelt- Melts Fast, Flavor Lasts Innovative Quality Since 1932 Dietary Supplement 1 Daily ActivMelt Instant Dissolve Natural Flavor Discussion: KAL B-12 Methylcobalamin ActivMelt micro tablets with natural tangerine flavor, melt quickly in the mouth and are designed for optimal absorption in the body. Methylcobalamin, or Coenzyme B-12, is biologically active from of Vitamin B-12, which is intended to provide nutritive support for normal healthy red blood cell synthesis, nerve function and homocysteine levels. Vegetarian.