your mitochondria love serotonin.
we are slowly learning that metabolic health via mitochondrial health is at the root of mental health issues
SSRIs don't really cure depression but they do act on your mitochondria and encourage the usage of oxygen for ATP synthesis which gives your brain greater amounts of available energy so you are less depressed.
Serotonin minting new mitochondria in cortical neurons: implications for psychopathology - PMC










