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A study led by the University of Barcelona has identified a key molecular mechanism in the loss of brown fat activity during ageing. The study opens up new perspectives for designing strategies to boost the activity of this tissue and prevent chronic metabolic and cardiovascular diseases as the population ages. From left to right, Tania Quesada-López, Francesc Villarroya, Albert Blasco-Roset, Marta Giralt, Alberto Mestres-Arenas, Joan Villarroya, Aleix Gavaldà-Navarro and Rub