The doctor duo that brought you to the low-carb lifestyle shows you how to regain in midlife the figure of sleek, flat-bellied youth. Why is it that even though we might maintain our high school weight, few of us maintain our high school belt size? In your twenties and thirties, the layers of fat on top of your abs were the problem. But once you reach middle-age, the enemy shifts. The 6-Week Cure for the Middle-Aged Middle...