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 many people can find times when they need to increase their calorific intake without increasin