People tend to go a little crazy when they are on a diet. Why? Because the diets themselves are often crazy. We'd all be acting a little weird if we drank nothing but fruit juice days on end. Dr. Aziz does not buy into the extreme-dieting craze; for him, healthy eating is about balancing hormones (fad diets tend to throw them out of whack). By optimizing the body's levels of 10 key hormones — insulin, glucagon, leptin, human growth hormone, thyroid hormone, estrogen, progesterone, testosterone, dehydroepiandrosterone and cortisol — people can increase energy and stimulate weight loss. It's based on Aziz's 40-20-40 formula, which calls for 40% of calories from good carbohydrates like beans and whole grains, 20% from protein and 40% from healthy fats. Hey, at least you get to eat.