Proscience Creatine is a pure, flavorless, micronized creatine monohydrate with no fillers or additives. Pro science Creatine is a naturally occurring molecule in the body that plays a key role in explosive energy metabolism. It helps to drive periods of short burst power output; like the first few reps in a set, or the explosive drive from the starting blocks. During exercise, intramuscular stores of creatine reload ATP molecules, the “energy machine of muscle”, for last between-set recovery.