This product hasthat may have Barley.
Water, citric acid, malic acid, caffeine, contains less than 2% of taurine, guarana extract, ginseng extract (panax), niacinamide, vitamin b6, vitamin b12, natural flavor, sucralose and acesulfame potassium (sweeteners), sodium citrate, potassium citrate, gum arabic, sucrose acetate isobutyrate, yellow 5, red 40, potassium sorbate (preservative).
Contains: caution: contains caffeine - 60 mg/squeeze (1/2 tsp) - 18 servings/bottle.,for adult use only. Always dilute. Use caffeine in moderation. Do not add to alcohol or caffeinated drinks. Consult doctor if pregnant/nursing.