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 a muscle building 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.*