Pre JYM’s 26-gram scoop size is considerably larger than the typical 5-10-gram scoop of other pre-workouts. The Pre JYM formula is based on amino acids (the building blocks of protein) that fuel the muscles for insanely intense workouts. The only stimulant in Pre JYM is caffeine, selected for its performance-enhancing benefits, not simply to give you a jolt. Amino acids like BCAAs, creatine, beta-alanine, and betaine are the foundation for real gains in strength, muscle-building, endurance, and overall performance.