High quality protein nourishes working muscles, allowing them to make bigger gains. Proteins break down into amino acids, which the body uses to help rebuild and grow muscle fibres. Progain bars give your body the calories and more importantly the high quality protein it needs to increase muscle mass and size. We also include creatine to help aid your performance during short duration, high-intensity exercise. Each bar contains 24g of high quality protein for muscle gain. Each bar contains 3g creatine to aid your high-intensity performance with this scientifically proven ingredient.