In the 1980s, Robert Haas fueled a diet revolution with his number one bestseller . Now, with , he shows you not only how to lose weight and dramatically improve your performance in all areas of life, but also how to keep the fat off—forever. Based on cutting-edge research on how and why our bodies use carbohydrates, proteins, and fats, Haas created a "Mediterrasian" diet that combines the best and healthiest aspects of diets from the regions where people live the longest. His approach features a ratio of 50 percent carbohydrates, which includes grains, fruits, and vegetables; 25 percent protein; and 25 percent fat. Haas also provides the specific reasons why this is the ultimate ratio for maximum energy, fitness, and permanent fat loss. offers a remarkably flexible, healthy food plan that encourages both the use of the new "functional" foods, such as tofu hot dogs and soy-chicken nuggets, and treats that most diet plans forbid entirely, such as chocolate, wine, and coffee. In fact, Haas tells you why enjoying chocolate and coffee every day could actually make you healthier, providing both satisfaction and valuable phytonutrients that prevent illness. It's the kind of eating plan that works for the entire family. As for exercise, Haas's recommendation is just as simple: Burn a minimum of 300 calories—the equivalent of 45 minutes of walking—throughout the day, through any activity you choose. Haas’s combined diet and exercise program changes lives.