Who formulates your pre-workout? If you have no idea, it may be time to re-think how you choose your supplements. Ultra Stim Pre Workout is formulated by the Guerrilla Chemist, an industry veteran who has formulated for multiple high profile supplement companies and is a master of Organic & Biochemistry. The Guerrilla Chemist has made a splash in the industry with his articles and videos explaining optimal supplementation, and has finally released his very own supplement brand. Enter Chemix Chemix is the Guerrilla Chemist's very own brand which has started with it's Ultra Stim Pre Workout. What separates Chemix Ultra Stim from competitors is it's transparent, effectively dosed performance, stimulant, and nootropic formula. GC has pulled out all of the stops on this product and it is sure to become one of the top pre-workouts on the market.