Originally Posted by IHateGymMorons
1. There are many ways to get glucose but the most effecient and most beneficial is through carboydrate intake. Stored glycogen in muscles and the liver (primary energy source) comes from carbohydrate intake. Only when they are fairly depleted does the rest come into play. Gluconeogenesis increases when total calories intake is lowered and the last thing you want is to deaminate circulting amino acids. How do you avoid that? Increase carb intake (ie protein-sparing action). Fats will also cause this but then it will also increase circulating FFA's which in turn will slow down the release of stored triglycerides. SO the the smartes and best choice is carbohydrates.
2. Total energy intake is reduced when you drop carb intake as well. When you compare the difference on energy metabolism and the oxidation of FFA's, decreasing fat intake has a MUCH better effect overall than decreasing carb intake. Decrease carb intake and increase fat intake and you decrease HSL, cAMP and thyroid output.
3. No, it does not illicit a larger insulin response. Check the GI, that measure the response. The more fat, the lower the GI. OTOH when you measure glycaemic load, the more fat, the higher the II score. You are confusing the two.