PFAS (per- and polyfluoroalkyl substances) can be found in many everyday items from cosmetics to raincoats and non-stick pans. They’ve also been found in food and water – and even in our bodies. But what exactly are they? And are they dangerous? Scientist Mark Miodownik explores.

Made by BBC Ideas in partnership with the Royal Society., external

Film by Christopher Brooks. Presenter: Mark Miodownik

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