THEY say life begins at 40 - but according to health campaigners, that is just when everything starts to go rapidly downhill. Researchers have found that 41 is the age when most Brits 'let themselves go. Many over-40s begin to eat too much, put on weight and cut down on the amount of daily exercise they take, according to a new study. And in a survey to mark the start of Diabetes Week, thousands of people said they wish they could turn back the clock. Daily Mail