11-year-old Gabby Bunnell does the same sorts of ... cream or cheese or drink regular milk Narrator It's unusual for lactose intolerance to develop before age two – it's typically diagnosed ...

However, Savaiano says it is possible to train one's own digestive system to break down the lactose ... but they are physiologically different," Savaiano says. "Babies do not develop lactose ...

On social media discussion websites like Reddit and Quora people are bemoaning the seemingly abrupt development of lactose ...