6x4 - Supersize vs Superskinny

Facing off in the Feeding Clinic is 24-stone takeaway addict Craig Nellies and superskinny cola addict Simon Tacaks, who's just too lazy to bother to eat. Dr Christian shows skeletal Simon how concentrated amounts of the chemicals found in cola can cause extreme damage to teeth. In America's fattest town, where levels of obesity-related diabetes have hit epidemic proportions, Dr Christian visits a patient suffering chronic wounds and organ damage. Plus, former anorexia sufferer Emma Woolf investigates anorexia during pregnancy.