Si S REGO Protein Bars contain a blend of easily digestible proteins (20 grams of protein per bar) in the form of whey, casein & soy protein. Sports scientists are increasingly recognising the importance of consuming protein in close proximity to training sessions (i.e. before or after training) in order to maximize how our muscles adapt to training. The importance of protein is also often overlooked by endurance athletes & for this reason Si S REGO Protein Bars provide an appropriate quantity of high quality protein for before or immediately post exercise.