This is such a dumb comment. Bodies are weird and have all kinds of reactions to all kinds of things. People should take peoples experiences with their own bodies at face value.

Without seeking to contradict your main point, it's worth noting that "These symptoms are curiously unheard of in Asia" could be genetic. In the same way that most westerners are OK(ish) with alcohol, but many asians aren't- they 'have a genetic variation that means their aldehyde dehydrogenase is either ineffective or less efficient' [1]

[1] https://www.thenakedscientists.com/articles/interviews/myth-...