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.

People develop lactose intolerance when their bodies don’t make enough of the enzyme lactase for the amount of dairy they consume, says Dr. Christopher Schmoyer, an assistant professor of ...

Unlike the lactase gene, however, the sucrase gene remains active throughout life. So maybe the natural mechanism for switching off the lactase gene after weaning — shared by all mammals — carries ...

LONDON--(BUSINESS WIRE)--The lactase enzyme market size is poised to grow by USD 118.42 million during the period 2019-2023, according to the latest market research report by Technavio. Request a free ...

This article was featured in One Story to Read Today, a newsletter in which our editors recommend a single must-read from The Atlantic, Monday through Friday. Sign up for it here. Almost every human ...

More than a quarter-billion dairy cows help supply the demand for milk worldwide. Scientists had long thought the popularity of milk helped explain the evolution of the genetic feature allowing many ...

If you have trouble digesting lactose (the sugar found in dairy products), lactose-free milk can be a good option to avoid digestive discomfort. However, for some people, drinking it every day might ...

Suckling of infants is universal among mammals, which are after all named after the Latin mamma for teat. Early mammals, around 200 million years ago, presumably had a variety of milk-specific sugars.