PURE-LE Active Vitamin B12 (50mL)Description Many people supplement their vitamin B12, but theres a catch: The common form of vitamin B12 is Cyanocobalamin (passive B12). It is inexpensive, lab made and contains cyanide to reduce its cost to 1% of the cost of better forms of B12. Most importantly, Cyanocobalamin cannot be used by your body without dramatically reducing its potency and releasing the cyanide. Conversely, Methylcobalamin (active B12) is found widely in nature and is