Can it really be so easy? A leading British scientist insists that the key to long life lies in a person’s metabolic rate – the amount of energy the body uses for normal bodily functions. Keep the rate low and you’ll be around much longer than normal. And how to achieve this ultra-desirable status? Eat less.

To support his theory, Dr Michael Mosley points to communities in Japan and the US that follow a strict low-calorie menu and appear to have a lifespan longer than the global average

In short, a diet of nutritious food does you the world of good. So what’s new?