>>11194887>it's the cause of depressionThe idea serotonin is involved in depression is one where the presumed problem is a *lack* of serotonin.
SSRIs are selective serotonin reuptake inhibitors.
Reuptake inhibition means preventing your brain from clearing some of it out in the way it normally would.
It's like if you put a stop in the bath tub so water would fill up instead of just going down the drain.