Stress, bad dietary habits, and antibiotic usage are just a few of the things that can disrupt the delicate balance of our gut flora. In such cases, taking probiotic products - which contain live and active microorganisms once they colonize the intestine -, prebiotics - which stimulate bacterial action - or symbiotics - which combine both - is a good natural and side effect-free alternative to significantly improving intestinal function and, by extension, optimizing our health.