Hericium erinaceus (also called lion's mane mushroom, bearded tooth mushroom, satyr's beard, bearded hedgehog mushroom, pom pom mushroom, or bearded tooth fungus) is an edible and medicinal mushroom belonging to the tooth fungus group. 

it is helpful to various diseases, such as Alzheimer's disease, immunoregulatory, and many types of cancer. A report reveals that pills of this mushroom are used in the treatment of gstric ulcers and esophageal carcinoma. And a 2011 study on rats demonstrates the mushroom's wound healing capacities.

Considering the increase of degenerative conditions, scientists around the world have launched investigations on the possible anti-dementia compounds of this mushroom.