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