When a 2023 laboratory study suggested that a byproduct of the artificial sweetener sucralose could damage DNA and weaken the gut's defenses, it raised the kind of alarm that travels quickly through a food-anxious public. Yet science rarely speaks in single voices: by 2026, European regulators had weighed the full body of evidence and concluded that what harms cells in a dish does not necessarily harm people eating a sweetened yogurt. The episode reminds us that the distance between a laboratory signal and a demonstrated human risk is one of the most consequential — and most easily collapsed —