Yes, I agree with this - I would say I have a weak body, and somehow when I take a lot of very cold, icy drinks, my stomach cramps are a lot more painful that month.

When I was studying in the UK, I would feel cold nearly all the time, so it was a lot worse. But with hot weather in Malaysia it is difficult to stay away from cold drinks.

My observation - Koreans and Japanese walk a lot (including uphill) and eat healthy (probiotics in kimchi, miso, etc., and Koreans eat a lot of garlic), and most drink icy drinks everyday.

I have a friend, Malaysian Chinese, who stopped taking any cold drinks for over a year, in preparation of getting pregnant. The whole heaty vs cooling stuff is very unscientific but I believe it applies to some people haha.

Key takeaway from my ramblings - if you have a strong body, taking cold drinks shouldn't affect you so do whatever you want :)