TIL Ulcers aren’t caused by stress, they’re most commonly caused by bacteria

Read more: https://www.mayoclinic.org/diseases-conditions/peptic-ulcer/symptoms-causes/syc-20354223

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  1. The guys who discovered this got the 2005 Nobel prize in medicine. They faced so much skepticism that one of them literally infected himself with the relevant bacteria to prove it causes ulcers.

    https://en.wikipedia.org/wiki/Barry_Marshall

    > After failed attempts to infect piglets in 1984, Sam Wang reported that Marshall, after having a baseline endoscopy done, drank a broth containing cultured H. pylori

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