(CNRS) Chronic caloric restriction strongly increases the lifespan of a small primate, the grey mouse lemur. This is one of the results of a ten-year experiment conducted by researchers at the CNRS and the MNHN. Chronic caloric restriction consists in eating a reduced but balanced diet from the outset of early adulthood. Its beneficial effect on lifespan had been established for many short-lived species (worms, flies, mice), but remained controversial for primates, including humans.