Living in Southeast Asia, and countries like Nepal, that has taught me to honor my gut, and put inside of it only the things that it feels happy with, but needless to say, I still had to experience some of the worst shit-storms (literally) in my life, all because of mixing together bacteria from one food to the other -- I'm sure they could learn a lot from the Asian people.
Experimenting with probiotics right now, and would love to hear about their effectiveness in a healthy diet.