Why have so many reality TV contestants taken their own lives?

Research by the New York Post has found that some 21 contestants on US reality television series have taken their own lives since 2004. But how do these people become so vulnerable? Jo Hemmings has worked as a behavioural psychologist on many reality TV shows in the UK.

(Photo: a remote control. Credit: Olivier Laban-Mattei/AFP/Getty Images)

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