25 g protein per can. Monster athletes do not win by accident, it takes years of hard work and determination to be a champion. Need a little motitvation to meet your personal goals? Meet your new coach in a can, Muscle Monster Energy Shake. Specially formulated with our Monster Energy Blend to help motivation you to train harder and longer, Muscle Monster also provides the fuel you need to power through your workouts. Muscle Monster's 25 grams of protein helps build lean body mass and aids in muscle recovery after a strenuous workout. Get in the game, break a sweat, break your record, break the rules, with Muscle Monster Energy Shake. Pump the beast! www.monsterenergy.com. Facebook. Instagram. Twitter. You Tube. Caffeine from All Sources: 83 mg per 8 fl oz serving (155 mg per can).