Appropriately called the Rainbow Diet, eating a variety of colorful foods will help increase weight loss. It's more than just the obvious fact that eating more fruits and vegetables is good for you — it is the combination of each of these colorful foods that helps you shed the pounds. The more nutrient rich your diet is, the more your metabolism is sped up to work toward a healthier you. Orange-colored foods in particular are great for weight loss, mostly because they promote detoxification in the body. As toxins leave the body, the weight tends to follow.