Dear Dr. Roach: I’m a 78-year-old retired medical oncologist. While in residency in New York, I got a gastrointestinal virus that left me with lactose intolerance. After a while, it improved somewhat.

Diarrhea that develops after you eat lunch meat may be related to one of several health issues, such as a food allergy or intolerance, immune dysfunction, or even food poisoning. Lunch meats are often ...

An individual can develop lactose intolerance at any age. It can be present from birth, when a person does not produce enough lactase due to a genetic feature. But, it can appear at any age. The ...