B12 vitamin is often used by bodybuilders when running their steroids cycle.B12 is responsible for protein synthesis which in case of bodybuilding is a must have even if you are using anabolic steroids.

Vitamin B12 is bound to the proteins in food and it requires stomach acid during digestion to release the B12 from the proteins. After release, it combines with a substance named intrinsic factor so that it can be absorbed into the bloodstream.

Its sold in packages of 6 vials of powder and 6 solvents to mix with.