Carbonated water, citric acid (ph control), sodium citrate, l-leucine, natural flavors, caffeine, l-isoleucine, l-valine, tartaric acid, sucralose, sodium benzoate (preservative), potassium citrate, potassium sorbate (preservative), acesulfame potassium, magnesium lactate, niacinamide (vit. B3), coenzyme q-10, pyridoxine hydrochloride (vit. B6), cyanocobalamin (vit. B12).
Manufacturer likely did not include an allergen statement; however, please double-check the product packaging and/or contact the manufacturer if you have a severe food allergy.