Nutrisport energy boost 41 has a low protein to carb ratio - at this low level of protein, gastric emptying is not slowed. The quick digestion and absorption of protein provides branched chain amino acids which stops the muscle protein itself being burnt up for energy whilst training. It also increases the insulin response which drives the carbohydrate into the muscles. This blend can provide 24% - 29% greater increase in endurance than carbohydrate only drinks, and 57% greater than water alone.The protein source is whey protein isolate hydrolysate. This avoids the problem of Milk_Shake texture and reflux, and gives rapid release of intact amino acids, which allows you to replenish your muscles is during the hour after exercise, so that you are fully fit for your next session. This replenishment is important, whether you are an endurance athlete, power athlete, rugby or football player. This is essential if you train or compete more than twice a week.