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Illustration: Kieran Blakey

The Nuance

Your Body Can Regulate Its Own pH

InIn the 1999 film Fight Club, Brad Pitt’s character dumps a skin-searing powder onto the hand of the character played by Edward Norton. “This is a chemical burn,” Pitt’s character explains. “You can run water…



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Markham Heid

I’m a long-time contributor at TIME and other media orgs. I write mostly about health. I grew up in Michigan, but these days I live in southwest Germany.