In animal studies of Parkinson's, there was a reduction in oxidative stress and dopaminergic lesions in the striatum and substantia nigra after 25 days.
Your Total Guide To Adaptogens | Part 6| Lion’s Mane

In animal studies of Parkinson's, there was a reduction in oxidative stress and dopaminergic lesions in the striatum and substantia nigra after 25 days.
Herbs have been researched and for thousands of years in many cultures, and in Chinese culture, this research has been documented as well, so we know a great deal about the brain enhancing qualities of herbs.