New study links serotonin disruption to long Covid symptoms

Researchers found that serotonin levels were lower in people with long Covid.
This serotonin depletion may explain cognitive issues and neurological symptoms of long Covid.
Viral particles were found in blood and stool samples of long Covid patients.
The findings suggest the serotonin pathway connects various theories on long Covid causes.
A clinical trial will test if fluoxetine (Prozac) and tryptophan can treat long Covid.