Researchers tested a processed form of Lion’s mane mushroom (Hericium erinaceus) to see if it could protect against Parkinson’s disease-like damage in mice. The mushroom mycelium was specially processed to break down cell walls and increase its effectiveness. When given to mice exposed to a Parkinson’s-causing toxin, the mushroom treatment restored dopamine levels and reduced harmful oxidative stress in the brain and liver in a dose-dependent manner.