Gelatin, fumaric acid, sodium citrate, artificial flavor, contains 2% or less of the following: aspartame (phenylketonurics: contains phenylalanine), maltodextrin (adds a trivial amount of sugar), acesulfame potassium, 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.