Mark Fisher addresses a component of the chemical imbalance theory, and why it doesn't go far enough:
>This commodification lay in the so-called ‘bio-chemicalization’ of depression. This is the assertion that depression is caused primarily by biochemical imbalance in the brain, namely low serotonin levels. To treat mental health illness is to treat the symptoms of a single person who ‘owns’ their illness. Depression is internalised and individuated. As such, we lose a sense of collective responsibility for mental health illness in terms of causation, understanding and treatment.
>This is not to dispute that depression is not neurologically verifiable. Rather, it is to dispute that the neurological disposition of depressed people is caused only by internal, biochemical factors. If, like Fisher, we ask: ‘What causes low serotonin levels?’ we are forced to comprehend mental health illness as a culturally contingent phenomena caused by a conjuncture of biochemical and societal factors.
From: https://thepanoptic.co.uk/2017/08/06/repoliticising-depressi...
>This is a crucial question. The way in which social and political problems are converted into individual pathologies, to be explained via chemical imbalances or family history, neatly sums up so much of what has happened under capitalist realism. It’s what I’ve called the privatisation of stress. Depression has been described as a pathology of responsibility: you feel intensely responsible for the state that you’re in. The excruciating paradox is that, while you feel that only you can get yourself out of depression, the condition consists precisely in your inability to act. There’s more than an analogy with the political hopelessness and fatalism that have characterised capitalist realism.
From: https://theoccupiedtimes.org/?p=3454
You can actually see just how much scrutiny the pure theory of chemical imbalance has come under from psychologists and sociologists on Google Scholar[0].
"The cause of mental disorders such as depression remains unknown. However, the idea that neurotransmitter imbalances cause depression is vigorously promoted by pharmaceutical companies and the psychiatric profession at large. We examine media reports referring to this chemical imbalance theory and ask reporters for evidence supporting their claims. We then report and critique the scientific papers and other confirming evidence offered in response to our questions. Responses were received from multiple sources, including practicing psychiatrists, clients, and a major pharmaceutical company. The evidence offered was not compelling, and several of the cited sources flatly stated that the proposed theory of serotonin imbalance was known to be incorrect. The media can play a positive role in mental health reporting by ensuring that the information reported is congruent with the peer-reviewed scientific literature."
[0] https://scholar.google.com/scholar?hl=en&as_sdt=0%2C5&q=depr...