If you understand a traffic light, you'll understand this powerfully effective low-glycemic diet. It's the easiest, most satisfying eating plan possible. Both a New York Times and Wall Street Journal bestseller, here's the book that explains how to lose weight permanently without feeling hungry, counting calories, or jeopardizing your health. Based on the Glycemic Index, or G. I. , the breakthrough nutritional discovery that measures the speed at which the body digests food and the impact it has on weight and well-being, The G. I. Diet organizes food into color-coded categories according to their G. I. rating: Red: Avoid. Yellow: Eat occasionally. Green: Make these foods the centerpiece of your diet. And that's it. No more guesswork, no more formulas, no more fads. The G. I. Diet guides you to permanent weight loss as well as increased energy and a decreased risk of heart disease, stroke and diabetes. This revised and updated edition includes more comprehensive food lists; inspiring success stories; new tips on dining out; motivational help; plus recipes, snack ideas, a shopping list, and more.