Joanna Moncrieff is a British psychiatrist, author and researcher who is a prominent and controversial voice in the research of depression.

Her 2002 study ‘The Serotonin Theory of Depression: A Systematic Umbrella Review of the Evidence’ concluded that there was no link between serotonin and depression, debunking the mainstream medical belief in antidepressants.

Moncrieff, whose research has drawn criticism from ‘Big pharma’ and support from fringe figures on the right, speaks to Krishnan Guru-Murthy in the latest episode of Ways to Change the World.

Produced by Silvia Maresca, Ka Yee Mak and Tom Gordon-Martin.