Gycocarn USP Glycocarn for Intense Pumps, Strength and Endurance DMAA & REV-PEA for Sustained Release CNS Stimulation Quercetin for Increased Muscle Mitochondria 20-HE for Muscle Growth Powder Dietary Supplement Rev-Pea 3X Metabolism Booster Laboratory Tested by NFN Whatever it Takes!Sustained Release CNS Stimulator No Crash, Jitters, or Tolerance Build Up. Maximize Endurance and Growth.In the era of concentrated pre-workouts, the race is on to create even stronger products with no emphasis on long term increases in: performance, muscle growth or preventing devastating "crashes" that can ruin your workouts. The lack of advancement in the stimulants used in other concentrates causes the users to build a higher tolerance which can make it harder for the user to experience the same "rush" as before. D-Stunner features the most advanced stimulytic blend of 1,3 Dimethylamylamine and REV-PEA which results in a no crash, sustained energy experience not available in any other concentrate. REV-PEA is an advanced blend of energy and focus enhancing phenylethylamines that are more potent and stable then phenylethylamines alone. It also features GlycoCarn for intense pumps not seen in any other concentrate (large amounts of stimulants can cause vasoconstriction, this can limit the "pump" during exercise) and 20-HE which promotes an anabolic response to your workouts every time. The most profound advancement in the concentrated pre-workout category however, is that of the bronchostimulator 3,7-dimethylpurine-2,6-dione. Combined with the mitochondria (energy producing centers of cells) boosting effects of Quercetin, 3,7-dimethylpurine-2,6-dione will boost endurance and performance like never before.