4/5
I'm into the "Pump" and I feel caffeine hinders that ability! If you are too than I highly suggest 2 servings of Dr. Jekyll which equates to: 200mg caffeine, 1.5g Agmatine, 3g citrulline, 3g Glycerol monostearate and 200mg L-Norvaline. No doubt in my mind you will experience ULTIMATE PUMPS...