My left armpit smell like onion sometimes but right armpit never smell

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I have never had any smelly armpit problem. But two year ago, one day I suddenly notice I smell like onion. Then I realize only my left armpit smells like onion, but my right arm never smells. My left armpit smells when I sweat. I saw your Ted talk, I was wondering if I can transfer my good bacteria from my right armpit to my left?


Dear Mara, thanks for your question. Good idea, but probably hard to implement in practise. The difference in underarm microbiome is probably minimal, with just a few species stronger in abundance than the right armpit, like we have seen for about half of the people we screened. It is worth the try, but no guaranteed success though. Best, Chris