A woman with advanced Alzheimer's reportedly showed significant brain function improvements after taking psilocybin mushrooms, per a case report.
https://www.foxnews.com/health/woman-advanced-alzheimers-regained-speech-memories-taking-magic-mushrooms
https://www.foxnews.com/health/woman-advanced-alzheimers-regained-speech-memories-taking-magic-mushrooms