One variation found frequently in Korean people has the problem start right at the pyloric valve, so they can eat a cheese burger, wait 20 minutes, and then engage in 30 and 40 foot projectile vomiting!
It's difficult to deal with the upper GI problem with just lactase pills ~ better for them to just become very paranoic about traditional American foods and not eat anything with dairy products in them ~ which can include balogna, frozen hamburger patties, most candy bars....
Can something like Bean-O help deal with the gas created? I thought most of our gas was a methane-type, not hydrogen.