From what I have read ( correct me if I'm wrong) it helps to carb up afterwards because it will help you prevent from going hypoglycemic. I also remember reading that it (igf) helped with a person who was diabetic, being that after a hard work out your blood sugar is down. The Igf helped to regulate his blood sugar levels with the carb intake (all after working out). Please correct me if I'm wrong but this is what I remember reading. Hope I explained it clearly. In a hurry and trying to type fast.
Also the pig sperm helped with the break down of the carbs (lol).