It’s that simple. The American diet is typically filled with fat and sugar, and you’ll never get a flat stomach on that recipe. Cut out meat, if you can, and even better, cut out dairy and eggs. But if you can’t, at least eat lean meats (low-fat turkey, skinless chicken breast, lean beef, fish), and stay away from fried food and too many sugary desserts. That doesn’t mean you have to starve yourself — if you’re eating healthy, you can actually eat a lot — or deprive yourself too much, but only eat the bad stuff in moderation. Vegan diet is the best, especially if it’s balanced, rich in vegetable protein and calcium and minerals, full of fresh fruits and veggies, and high in fiber.