Since the beginning of bodybuilding, the PUMP is what we strive for in the gym. MUTANTs live for the pump — that extra special feeling when you squeeze out another bicep curl or a chest-swelling bench press. You know the feeling — that shirt splitting, swollen-to-the-max feeling that shocks others and demands respect. MUTANT PUMP is designed for you. Take just one serving before some hardcore training and you’ll know.