The species of bacteria and fungi that colonize the gut may determine our interactions with the environment, protecting us from or predisposing us to the development of allergy and autoimmunity. They may protect us from or predispose us to becoming obese or diabetic. They may inhibit or intensify inflammation in the body. They may interact with artificial sweeteners to cause insulin resistance and weight gain in some individuals. They may even influence mental function and emotional wellness.
