A look at the often life-threatening hazards of losing weight, with advice on which regimens might be best avoided, including a look at the vast array of fad diets and injections and the horror stories they're spawning. The programme reveals how running marathons can kill you, how much poo is lurking in an office coffee cup, and how fruit juice has more calories than a full fat cola drink. There are also tips on the best ways to effectively and safely lose weight and keep it off