Fumaric acid (provides tartness), dextrose, natural flavors, salt, artificial color, tricalcium phosphate (prevents caking), ascorbic acid (vitamin c), yellow 5 and yellow 5 lake, dioctyl sodium sulfosuccinate (for solubility).
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.