Monster ultra red ingredients: carbonated water, citric acid, taurine, erythritol, sodium citrate, l-carnitine l-tartrate, potassium sorbate (preservative), caffeine, acesulfame potassium, sodium benzoate (preservative), sucralose, gum arabic, niacinamide (vit. B3), natural flavors, d-calcium pantothenate (vit. B5), salt, ester gum, inositol, red #40, pyridoxine hydrochloride (vit. B6), blue #1, cyanocobalamin (vit. B12). monster ultra zero ingredients: carbonated water, citric acid, erythritol, taurine, sodium citrate, natural & artificial flavors, panax ginseng extract, l-carnitine l-tartrate, sucralose, caffeine, sorbic acid (preservative), benzoic acid (preservative), niacinamide (vit. B3), acesulfame potassium, d-calcium pantothenate (vit. B5), salt, guarana extract, d-glucuronolactone, inositol, pyridoxine hydrochloride (vit. B6), cyanocobalamin (vit.b12). monster ultra blue ingredients: carbonated water, citric acid, erythritol, natural & artificial flavors, taurine, sodium citrate, panax ginseng extract, l-carnitine l-tartrate, caffeine, sorbic acid (preservative), sucralose, benzoic acid (preservative), niacinamide (vit. B3), acesulfame potassium, d-calcium pantothenate (vit. B5), salt, guarana extract, d-glucuronolactone, inositol, pyridoxine hydrochloride (vit. B6), blue #1, red #40, cyanocobalamin (vit. B12).
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.