The world is affected by an obesity epidemic, but why is it that not everyone is succumbing? Medical science has been obsessed with this subject and is coming up with some unexpected answers. As it turns out, it is not all about exercise and diet. At the centre of this programme is a controversial overeating experiment that aims to identify exactly what it is about some people that makes it hard for them to bulk up.

• DirectorEmma Sutton
• Release26 January 2009
• GenreDocumentary
• Duration0h 59m
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• Productions

  BBC, BBC Horizon