Technically, all humans are at least a little intolerant to dairy products, which is why it will upset your stomach if you have too much.
With me, it's too much fruit. Fibre...
"I work in one of those humble call centres... Apparently, what we're doing at the moment is 'sprinkling our magic along the way'. It's a call centre, not Hogwarts." ~ Caroline Garlick, Ayrshire, BBC News Magazine
I can keep pretty much anything down, but I won't tend to eat dodgy things in the first place.
Milk + Fruit/Fruit Juice (natural or not) = Bathroom Break