Pro-Fuel is a carbohydrate product based on maltodextrin. Although complex, it has a high glycemic index score that indicates the ease with which it is digested, thereby overcoming perhaps the biggest hurdle for those who wish to add weight. If this is you, then adding Pro-Fuel to your protein shake will not only bump up the calories, it will also create a protein-sparing effect to augment muscle gain.
Any competitive athlete who is subject to extreme dietary variables, e.g. carb depletion, can benefit massively from using Pro-Fuel in the early stages of glycogen repletion.