When the small intestine is unable to digest lactose, food particles pass to the large intestine either semi-digested or undigested. Gut bacteria ferment the undigested food, creating gas. This gas is naturally expelled from the body in the form of flatulence. Lactose intolerant individuals typically produce odorous gas, which can be uncomfortable and embarrassing.

This site offers information designed for educational purposes only. You should not rely on any information on this site as a substitute for professional medical advice, diagnosis, treatment, or as a substitute for, professional counseling care, advice, diagnosis, or treatment. If you have any concerns or questions about your health, you should always consult with a physician or other healthcare professional.