Documentary looking at the physiological and psychological changes that happen to young people as they strive to alter their appearance. Using computer graphics we travel inside the body and explore the science behind the most popular beauty and cosmetic treatments, from a man having the latest hair transplant treatment to revealing what actually happens to our skin as people inject synthetic hormones to achieve the perfect tan. We meet beautician Lucy from Essex who, after losing weight in her teens, wants breasts enlarged to improve her figure, and young bride-to-be Kirsty, who wants to test out Botox before the big day. Through the highs and lows, this is the inside story of how cosmetic surgery works.

Documentary looking at the physiological and psychological pressures people face as they battle the bulge. Using computer graphics to travel inside the body, the film explores the science of fat, how we get it and what happens to our body when we get rid of it. We meet Ebonie, whose crash diet has pushed her body into starvation mode, and follow Joe as he undergoes an extreme liposuction operation where ultrasound technology sculpts fat away to produce his perfect physique. We discover the science behind the diet pills which left Sam in a mental health unit and explore how binge eater Hayley has used food as an emotional prop throughout her life. Through the highs and lows, this is the inside story of 'How Fat Works'.