metabolic nutrition | esp - stimulating pre workout, pre intra workout supplement | energy & endurance stimulating | natural, safe & mental focus | blue raspberry, 300 grams (90 servings) metabolic nutrition e.s.p. (energy stimulant pre-workout) is the most effective, high-energy, no crash, fast-acting pre-workout stimulant on the market. e.s.p. offers laser sharp focus and explosive power in every scoop. e.s.p. is a high-potency stimulant driven pre-workout product designed to deliver maximal energy while controlling focus. using a specialized scoop, you determine the amount you use so that you can dial in your need based on the workout you are doing. because of the scientifically engineered combination of ingredients, e.s.p. provides laser-like focus without the high stimulant post-crash drop off commonly seen in other pre-workout products. with e.s.p., getting amped up and powering through workouts has never been so easy.