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 ...

While occasional bloating is usually harmless, frequent discomfort can interfere with daily life and eating habits.

It's every dairy lover's worst nightmare: One day you’re eating cheese by the hunk and ice cream by the pint, and the next you can’t stomach a sip of milk without becoming as gassy as someone with IBS ...