C4 Original has been fueling athletes & fitness enthusiasts of all types for over a decade. Explosive Energy - Increased training intensity with 200mg of caffeine. Muscular Endurance + Pump - High-performance sessions powered by CarnoSy®n Beta-Alanine and improved muscular pump with Velox® Patented Performance Blend. AI-Powered Peptides - Includes PeptiPump®, AI-powered designer peptides only found in C4. Enhanced Focus - Heightened focus to support mind-muscle connection with 200mg of caffeine and added Huperzine A.