Citric acid, maltodextrin, instant black tea, aspartame (phenylketonurics: contains phenylalanine), acesulfame k, contains less than 2% of magnesium oxide, calcium phosphate, calcium silicate, natural flavors, red 40 lake, yellow 6, red 40, sugar (adds a trivial amount of sugar), blue 1 lake, 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.