Proprietary energy blend: taurine, caffeine, l-phenylalanine, n-acetyl l-tyrosine, glucuronolactone. Other ingredients: filtered water, malic acid, natural & artificial grape flavor, potassium sorbate & sodium benzoate (to protect freshness), sucralose, acesulfame potassium, fd&c red 40, fd&c blue 1.
Phenylketonurics: contains phenylalanine. Contains about as much caffeine as a cup of premium brewed coffee. Limit or avoid products containing caffeine to avoid jitters, sleeplessness and rapid heartbeat. Stacker 2 energy shot contains niacin (as niacinamide) so some people may experience a flush feeling, hot sensation or redness of skin that lasts for a few minutes. Not for use by children, pregnant women or individuals sensitive to caffeine. Do not consume more than 1 shot every 6 hours. Discard unused shot.