Pre-workout  is a powerful fitness supplement  designed to boost energy , focus , and training performance . It typically includes key ingredients like caffeine , beta-alanine , L-citrulline , and essential amino acids , all of which improve blood flow , increase endurance , and delay muscle fatigue  during high-intensity workouts. Benefits of Pre-Workout Higher energy levels  for intense workouts Improved workout performance  and strength output Better focus and concentratio