Maltodextrin, citric acid, malic acid, sodium citrate, aspartame (phenylketonurics: contains phenylalanine), contains less than 2% of acesulfame potassium, natural and artificial flavors, magnesium oxide, ascorbic acid (vitamin c), calcium silicate, xanthan gum, red 40, artificial color, watermelon juice concentrate (adds a trivial amount of sugar), 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.