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.

A viewer is asking Doctor Lacy Anderson if there's anything that can be done for lactose intolerance. Lactose intolerance happens when your small intestine does not make enough lactase, a digestive ...

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 ...