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In a one-off special, TV doc Michael Mosley answers some pressing questions about mental health.

Among them: how should we relieve stress? Are mental health problems hereditary? And how safe are anti-depressants?

Meanwhile, Dr Zoe Williams discovers the benefits of bouldering (climbing to you and us) while Dr Giles Yeo and Dr Alain Gregoire take a look at the impact of diet and sleep on wellbeing.