Mind & muscle fuel for stronger finish. All natural, protein powered, 100mg caffeine. Delays onset of mind and muscle fatigue. Gives you the added energy when you need it most. 2nd Surge contains a proprietary formula of rapidly acting carbohydrates, proteins, caffeine and antioxidants proven to: increase the delivery of critical nutrients, maintain metabolic energy needs, inhibit the release of fatigue signals in the brain, reduce muscle damage.