In the Feeding Clinic 24-stone chocaholic Laura meets superskinny energy drink addict Jake, who is only eight stone. Laura goes to Missouri, in the US, to meet Betsy, whose life has been destroyed by overeating, and is so heavy her doctor suggested she be weighed at the local zoo! In Las Vegas, Dr Christian sees first hand the ravages of diabetes, as he meets a woman who lost her leg to the condition. And Emma Woolf begins a two-part investigation into the prevalence of eating disorders among athletes and dancers.