There are many reasons why diets fail. 7 Top Reasons Are: 1. Fad Diets Have Little Success 2. Calorie Restriction Can Burn Muscle - Muscle Burns Fat 3. Toxins Harbor Fat 4. The World Is Becoming More Toxic 5. Yo Yo Dieting Is Unhealthy 6. Foods Are Getting Less Nutritious (Processed Foods Lack Nutrients) 7. Old Habits Are Hard To Break