Citric acid, potassium citrate, aspartame (phenylketonurics: contains phenylalanine), calcium phosphate, acesulfame k, contains less than 2% of sugar (adds a trivial amount of sugar), natural and artificial flavors, maltodextrin, calcium silicate, red 40, blue 1.
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.