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A SPARSE diet has extended the lifespan of monkeys, adding support to the notion that eating less slows ageing in people too.

鈥淐aloric restriction鈥� makes worms, flies and mice live longer, so to see if it works for primates, a team led by of the University of Wisconsin-Madison monitored 76 rhesus macaques for 20 years. The team fed half of them 30 per cent fewer calories throughout adulthood. Today, 37 per cent of these animals are alive, compared with 13 per cent of the control group (Science, ).

鈥淚f caloric restriction does not extend human lifespan, we鈥檙e an exception on the planet,鈥� says gerontologist of Harvard University.