They were developed as diabetes drugs, but their potential to promote significant weight loss has become clear. And now, study after study suggests that drugs like Ozempic and Wegovy could have all sorts of health benefits, leading some scientists to hail them as a breakthrough that could transform many chronic diseases of ageing. But what’s the mechanism behind these effects, and is it due to more than just weight loss? The Guardian’s science correspondent Nicola Davis tells Madeleine Finlay what we know so far
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