The Truth About Slim People

We’re all told that in order to prevent weight gain or obesity, we need to be mindful of what we eat and exercise regularly. But what about slim people who eat whatever they like and consume lots of food but never seem to put on weight? Are they slim, as the old adage goes, because they have a faster metabolism than everyone else? This documentary investigates why some people maintain a healthy weight, even if they eat more and move less than everyone else.