Lately I've been reading about how gut microbiomes vary wildly between people from different regions, and it makes me wonder if we're overgeneralizing when we talk about 'healthy bacteria'. A friend in Japan swears by fermented foods, while my cousin in the US swears by probiotics from the pharmacy, and both claim their approach works. Given that we're all unique at the microbial level, how much should personalized medicine rely on our individual microbiomes instead of one-size-fits-all guidelines?