PURIFIED WATER, CITRIC ACID, ERYTHRITOL, L-THEANINE, CAFFEINE. CONTAINS LESS THAN 2% OF TAURINE, SODIUM CITRATE, POTASSIUM CITRATE, NATURAL FLAVORS, ASCORBIC ACID (VITAMIN C), NIACINAMIDE (VITAMIN B3), PYRIDOXINE HYDROCHLORIDE (VITAMIN B6), CYANCOBALAMIN (VITAMIN B12), SUCRALOSE, GUM ARABIC, GUARANA SEED EXTRACT, PANAX GINSENG EXTRACT, STEVIA LEAF EXTRACT (REB A).