Doctors' Notes: Light

Chris and Xand continue their conversation about the sun's effect on our happiness with Professor Hester Parr, human geography and research lead of Living with Seasonal Affective Disorder.

The doctors want to know how low light affects those with Seasonal Affective Disorder (SAD), how the disorder is viewed and what research is being done to help treat those with it, including that being conducted by Professor Parr.

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Presenters: Drs Chris and Xand van Tulleken Guest: Professor Hester Parr Producer: Claire Justin Visual Producer: Leon Gower Executive Producer: Jo Rowntree Editor: Claire Justin Tech Lead: Reuben Huxtable Social Media: Leon Gower Digital Lead: Richard Berry Composer: Phoebe McFarlane Sound Design: Melvin Rickarby

At the BBC: Assistant Commissioner: Greg Smith Commissioning Editor: Rhian Roberts

A Loftus Media production for BBC Radio 4.