Psilocybin may help the brain recover from repeated concussion, but evidence remains limited to animal research

Psilocybin reduced several biological signs of repeated mild traumatic brain injury in middle-aged female rats, suggesting a possible future avenue for concussion treatment. Given shortly after three daily head impacts, it reduced brain-fluid leakage, partly normalized abnormal blood-vessel responses, restored or increased functional connectivity, lowered phosphorylated tau, and increased BDNF and its receptor TrkB, which support neuronal adaptation and repair. The findings are comprehensive but preliminary: the study used animals, primarily females, and treatment occurred within 30 minutes of injury. It is unknown whether altered consciousness is necessary, whether benefits persist or work when treatment is delayed, and whether imaging and molecular changes improve symptoms. Psilocybin is not an established concussion treatment, and the findings do not support self-medication.