Marissa

“The idea that depression is caused by low serotonin levels in the brain is now deeply embedded in popular folklore, and people with no neuroscience background at all will routinely incorporate phrases about it into everyday discussion of their mood, just to keep their serotonin levels up. Many people also don't know that this is how antidepressant drugs work: depression is caused by low serotonin, so you need drugs which raise the serotonin levels in your brain, like SSRI antidepressants, which are 'selective serotonin reuptake inhibitors'. But this theory is wrong. The 'serotonin hypothesis' for depression, as it is known, was always shaky, and the evidence now is hugely contradictory ... But in popular culture the depression-serotonin theory is proven and absolute, because it has been marketed so effectively.”
― Ben Goldacre, Bad Pharma: How Drug Companies Mislead Doctors and Harm Patients