**4.4 Zone diet**

Meals are designed to contain 40% carbs, 30% protein, and 30% fat. Carbs are ranked as good or bad based on the glycemic index. Foods like chicken and barley are recommended but not potatoes and egg yolks. Studies have found it had a positive effect on glycemic control and waist size, so it may be a good choice. Ask your doctor about it (zonediet.com).
