Lactose intolerance is usually diagnosed based on symptoms, but a healthcare provider can also perform breath and blood testing. Breath tests are also available as over-the-counter home test kits.

DEAR DR. ROACH: I am lactose intolerant and have recently learned that lactose is used in many prescriptions, but there is no warning on the information sheet. I only became aware of this after ...

Lactose intolerance is the most common food sensitivity worldwide. Lactose intolerance and dairy allergy are not the same, but the differences can be misunderstood. How do you know if you are ...

Hydrogen and methane breath tests (HMBT) are a noninvasive diagnostic tool commonly employed to evaluate small intestinal bacterial overgrowth (SIBO) and issues with carbohydrate malabsorption, such ...