What this means is that after our body has used up all the sugar in said carbs it is still working at extracting and transforming the protein into useable energy... so we don't become afflicted with that "I'm Starving Cave" in our middle. Their glycemic index value is also very low as they are full of dietary fiber. Boom, now all of a sudden they feel like they have been re-energized. That is the difference between fat loss and weight loss, and the difference between the approach I recommend and all the books and programs touting weight loss.