October 7, 2021. Serotonin is Elevated in Diarrhea Associated COVID-19
This article shows a study that measured the levels of serotonin in patients with diarrhea associated COVID-19
There is a clear association between the presence of serotonin and the presence of diarrhea associated COVID-19.
These data suggest that increased serotonin may contribute to diarrhea and the severity of COVID-19.