C4®, is America's #1 pre-workout and fastest-growing energy drink brand with a signature blend powered by CarnoSyn® Beta-Alanine, BetaPower® and other key ingredients that support explosive energy, alertness and performance 473ml per can C4 ENERGY INGREDIENTS Explosive Performance Energy Blend 200 mg Caffeine CarnoSyn® Beta-Alanine – Designed to delay the onset of fatigue, resulting in improved power and performance* L-Citrulline – Supports an increase in nitric oxide levels* BetaPower® Betaine – Naturally-derived from beets, BetaPower Betaine helps to support hydration and better physical performance.* N-Acetyl-L-Tyrosine – Supports mental and cognitive health during stressful activities*