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Are there stony masses growing in your stomach? While bezoars are considered rare, caution should be taken when eating and ingesting certain fruits, vegetables - and hair. In the first Harry Potter novel, Professor Severus Snape hopes to embarrass Harry by quizzing him on the topic of bezoars. According to Snape, they are stony masses found in the stomach of a goat that can act as an antidote for most poisons.

Later in the series, bezoars come to the rescue of a poisoned Ron Weasley. The name bezoar is a derivative of both the Persian and Arabic languages, translating as “antidote” and “against poisons” – which is probably where J.K.



Rowling got her inspiration. But many Harry Potter readers may not have realised that bezoars aren’t just a product of Rowling’s imagination. And while it’s true they can be found in the stomachs of goats and other animals, humans can also develop bezoars – albeit rarely – in their stomachs, intestines, gullets and even windpipes.

Bezoars range in size and weight. In July 2024, a 40cm mass of hair, weighing 907g, was surgically removed from a 24-year-old woman’s stomach in Manabi, Ecuador. In March 2024, doctors in Newcastle removed a 15cm hairball from the stomach of a 7-year-old girl.

According to reports, it covered 80% of her bowel..

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