Researchers at Edinburgh University have claimed they can predict who is susceptible to obesity. They said their work explains how some people can consume high-fat food without putting on weight. They have been working with mice which, like humans, are prone to becoming fat when given a rich diet. The study discovered that some of the mice have a natural ability to deal with a “junk food” diet without suffering ill-effects. The research was funded by the Wellcome Trust and led by endocrinologist Dr Nik Morton. It involved feeding mice a diet of “mouse hamburgers” to simulate the food consumed by many humans.