James Gallagher asks whether a weight-loss drug on the NHS heralds a new era in tackling obesity. He meets Jan, who lost nearly four stone after being part of a trial taking a weekly injection of Semaglutide for 15 months alongside advice on meals and exercise. However, when people stop taking the drug the weight starts to go back on. Add to that supply shortages with heightened private demand and some doctors think the drug is as controversial as they come. James unpicks the ethical and societal dilemmas against a backdrop of half the world's population projected to be overweight or obese by 2035.
Producer: Erika Wright
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