The shiitake mushroom is native to Japan, China, and other East Asian countries, where it naturally grows on fallen trees in the forest: hence the common name, “black forest mushroom.” Deliberate cultivation of shiitake, both for food and medicine, is of ancient origin.
During the Ming Dynasty period (1368-1644), shiitake developed a reputation as a “tonic,” a substance said to increase energy, prevent disease, aid convalescence from illness, and slow bodily deterioration caused by aging. It was also used more specifically to treat respiratory illnesses, liver diseases, and intestinal infestation with worms.
The soft fleshy cap (“fruiting body”) is the part used medicinally.
What Is Shiitake Used for Today?
As yet, there are no proposed uses of shiitake mushroom or shiitake mushroom extracts that are supported by reliable scientific evidence.
When taken orally, shiitake mushroom is most commonly used in the form of an extract: lentinus edodes mycelium extract (LEM). The typical dose of LEM is 1-3 grams 3 times daily.
Purified lentinan suitable for intravenous use is licensed as a pharmaceutical in Japan; it is not available in the United States.
The safety of concentrated shiitake extracts, however, is less clear. Safety in pregnant or nursing women, young children, or people with severe liver or kidney disease has not been evaluated.
- Reviewer: EBSCO CAM Review Board
- Review Date: 07/2012 -
- Update Date: 07/25/2012 -