Flushing out your digestive system involves a few different steps. First, you need to remove any unhealthy foods from your diet and replace them with nutrient-rich foods. You can also try fasting or juicing to give your digestive system a break and allow it to reset. Next, you can try supplements such as fiber, digestive enzymes, and magnesium oxide. These can help to keep your digestive system regular and remove toxins from your system.