20 g Protein Bar With Other Natural Flavors Kosher Low Glycemic† Non-GMO Ingredient Sources The Official Protein Bar of Spartan Race - You'll Know at the Finish Line Fitness is Built You're not done. You're work in progress, building toward something great. That's why we made Clif Builder's - the great-tasting protein bar that makes every ingredient count - so you can get the most out of your workout. 20 g of complete protein, with essential amino acids to help repair and build muscle. Carbohydrates to help replenish your muscle glycogen stores after a workout. Vitamins and minerals to support protein metabolism. †Low-glycemic-index foods digest slowly for prolonged levels of energy.