Power every training session with the NSF Certified for Sport® pre-workout trusted by professional and collegiate athletes. Packed with 200mg of caffeine for Hard Hitting Energy™, fatigue-fighting muscular endurance, and critical electrolytes for elite hydration, C4 Sport redefines high performance for athletes at every level*^. KEY FEATURES HARD HITTING ENERGY™: Power hard-hitting training sessions with 200mg caffeine. MUSCULAR ENDURANCE: Combat muscular fatigue with clinically studied CarnoSyn® Beta-Alanine^*. ELITE HYDRATION: Replenish key minerals and critical electrolytes lost during tough training. NSF CERTIFIED FOR SPORT®: Tested and certified for professional and collegiate athletes. INCREDIBLE FLAVOR: Variety of delicious flavors with ZERO sugar or artificial colors. C4: Backed by 20 years of sports nutrition expertise, we’ve raised the bar with an innovative selection of supplements. ^Studies have shown benefits of CarnoSyn® Beta-Alanine to be correlated with cumulative use.