Prunes are excellent natural laxatives. Yogurt is considered a natural laxative, as it promotes the growth of healthy bacteria in the intestinal tract. Foods high in water content, such as lettuce, are considered good natural laxatives. Eating grapefruit can increase hydration levels and work as a natural laxative.Celery is a high-fiber food.vocados are a good choice for a natural laxative. Peas, which are high in fiber, may be used as a natural laxative. Aloe vera is sometimes taken as a supplement to treat digestive issues. Watermelon could be used as a natural laxative because it has a high concentration of water.