David Healy is head of psychiatry at the Hergest psychiatry unit in Bangor . Claims the idea low levels of serotonin causes depression is a fallacy . The study was carried out by Dr John McGonigal and colleagues from University College London, who found that people with high levels of serotonin were more likely to have suicidal thoughts than those without it Experts refute his claims saying 'SSRIs work in the real world of the clinic '
David Healy is head of psychiatry at the Hergest psychiatry unit in Bangor . Claims the idea low levels of serotonin causes depression is a fallacy . Marketing of SSRI drugs like Prozac has been 'based on a myth ' , he claims . Experts refute his claims saying 'SSRIs work in the real world of the clinic '