Why activated B12? Activated B12 (methylcobalamin) is the form of B12 the is actually absorbed by the body and also remains in your body for a longer period of time. This is unlike cyanocobalamin, which has a cyanide group attached to it – famous for being a poison. Although in small amounts, it is not preferred! Therefore, taking activated B12 will result in enjoying all of its health benefits – such as increased energy, improvement in mood, mental clarity, and much more!