Carbonated water, citric acid, natural flavor, potassium benzoate (preservative), potassium citrate, orange juice concentrate, gum acacia, aspartame, caffeine, acesulfame, potassium, sucralose, brominated vegetable oil (adds a trivial amount of fat).
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.