The bulk of what you eat should be made of healthy, whole foods made from one ingredient or a combination of one-ingredient foods (like Ezekiel bread). Limit the processed carbs, excess sugar and salt, and packaged foods made with artificial ingredients. Registered dietitian Leslie Langevin, MS, RD, CD, of Whole Health Nutrition recommends choosing whole grains such as oats; fruits like berries; veggies like courgette and leafy greens; healthy fats like avocados, nuts, and seeds; and lean proteins like beans and eggs.