Reishi, also known as lingzhi, is the ancient "mushroom of immortality".
Reishi has been used as a traditional medicine in East Asia for thousands of years.
It is hard, usually flat, zoned bracket fungus; reddish brown, shiny top. Grows singly or in groups of up to several, at the base of living and dead deciduous trees, and also around stumps.
Reishi mushrooms contain several molecules that are believed to be responsible for their health benefits – triterpenoids, polysaccharides and peptidoglycans.
Mostly the reishi mushrooms are grown in the western part of Bhutan.