Protein + Caffeine. Built with purpose. This isn’t just a destination, It’s a journey. That’s why we’ve taken delicious Clif Builders and added a boost of 65 mg caffeine, equivalent to a shot of espresso (Caffeine can range between 60-70 mg. Not recommended for pregnant or nursing women, children under 18 years old, or people sensitive to caffeine. USDA reference database for 1 fl. oz. of espresso is 63 mg caffeine). With 20g of complete plant protein and essential amino acids to help rebuild muscle. Clif Builders Protein + Caffeine is made for anyone looking for extra energy before a workout-or to help maintain muscle and energy after one. Because protein + caffeine = a bar that works as hard as you do.