Carbonated water, caramel color, phosphoric acid, natural flavor, aspartame, potassium benzoate (preserves freshness), potassium citrate, citric acid, caffeine, acesulfame potassium, calcium disodium edta (to protect flavor).
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.