For years I have heard about how most Asians are lactose intolerant, but I have a hard time believing it. People eat ice cream like it's going out of style, and while someone implied in another thread that the stuff here isn't actually from milk, I suspect that was said tongue in cheek.

And then there's the question of alcohol. I know some Chinese get red faces from the stuff, but so do lots of Irish, so what's the deal? And is this an issue of just that it makes people flushed, or are they didn't problems as well?

These are the things I need to know.