3) Avoid consuming refined carbohydrates, like sugar and processed foods.
Sugars and carbohydrates are absorbed by your small intestine quickly, and without the need for digestion by the microbiome bacteria. The bacteria still need to find nourishment, however, and if you do not provide it by eating the right foods, the bacteria will consume what remains: the lining of the intestines. Sugar also feeds the harmful gut bacteria and fungi that attack the lining of the colon. A good rule of thumb, then, is to avoid sugars and refined carbohydrates as a fundamental basis of a healthy diet and microbiome.