RPG is the most critical supplement you probably aren't taking that will maximize your bodybuilding and athletic goals. Glucose partitioning can be quite confusing if you don't fully understand what creates new muscle gains and what does not. The large majority of people in the world need carbs to effectively gain muscle or lose fat. However, it's widely believed that too many carbs can result in excess body fat. This is true, but it's not the whole story.
When you eat carbohydrates your body releases insulin from the pancreas. Insulin is your storage hormone that can either work in your favor or to your detriment if you aren't very careful. RPG will ensure that every carb you eat will either be used to build new muscle or to aid in the fat burning process. The excess carbs will no longer be available to store as body fat.
RPG as a glucose portioning agent will make sure that the insulin released by the pancreas while eating a meal in high carbs does not get there too quick and oversaturate the muscle (or fat) cells. This lengthy process will put your body in a much greater anabolic environment, more suitable to athletic goals.