Elevated serotonin levels drive synaptic plasticity, stimulating neurons in key brain regions to wire up. It's this increase in grey matter over weeks that is a

Elevated serotonin levels drive synaptic plasticity, stimulating neurons in key brain regions to wire up. It's this increase in grey matter over weeks that is associated with better outcomes, particularly in PTSD. This has been shown in several studies that use MRI before and after treatment, and explains the lag time.