Citric acid, natural and artificial flavors, aspartame (phenylketonurics: contains phenylalanine), maltodextrin (adds a trivial amount of sugar), contains 2% or less of the following: artificial color, magnesium oxide, acesulfame potassium, ascorbic acid (vitamin c), red 40, yellow 5, 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.