For athletes of all types, from the gym to the court, on the field and in the ring, C4 Performance Energy® fuels sport + fitness performance. When every second matters, there’s no room for compromise. With 200mg Caffeine Zero Sugar or Artificial Colors NSF Certified for Sport CARNOSYN® BETA-ALANINE — Clinically studied ingredient that fights fatigue and powers muscular endurance BETAPOWER® — Clinically studied ingredient that supports muscle cell hydration and physical performance KEY NUTRIENTS — Niacin and Vitamin B12.