6x7 - Supersize vs Superskinny

It's all out war as round-the-clock snacker Emma Cain goes head to head with Robert Musgrove, who can't be bothered to eat. Dr Christian shows lager-guzzling Emma just what her favourite tipple is doing to her body. In America's fattest town he visits an after-school scheme that aims to help combat childhood obesity. And Emma Woolf travels to Holland to investigate online therapy in the treatment of eating disorders.