FIFTEEN YEARS ago Valerie Taylor, a psychiatrist at the University of Calgary, in Canada, was approached by two people with bipolar disorder, a severe mental illness involving manic and depressive phases. Neither of them had received any benefit from standard treatments, but their symptoms had markedly improved after taking antibiotics. They were keen to know: was there a link?
This article appeared in the Science & technology section of the print edition under the headline “Gut feelings”
From the March 7th 2026 edition
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