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 Shiitake mushrooms are typically found growing naturally
on the fallen and decaying broadleaf trees in Japan, China, and
other Asian countries. Because of its medicinal applications,
shiitake is now cultivated in the United States and throughout the
world.
In the wild, shiitake mushrooms are typically found
growing on fallen broadleaf trees. Because of its medicinal use, it
is now cultivated in the United States and throughout the world in
manmade gardens and green houses.
The key chemical ingredient
found in the Shiitake mushrooms is a polysaccharide known as
lentinan. Shiitake mushrooms also contain constituents including
complex carbohydrates, proteins, fats, soluble fiber, vitamins, and
essential minerals. A process called lentinus edodes mycelium
extract (LEM) which uses a powder called nycelium is the common
commercial method for preparing the shiitake for use. LEM is high in
lignans and polysaccharides.
Preliminary trails indicate that
oral supplementation of shiitake may be useful for people suffering
from hepatitis B. Lentinan, the most important constituent of
shiitake, is used in Japan in a very purified, intravenous form. It
has been reported to increase survival in people with recurrent
stomach cancer, especially when used along with chemotherapy. It has
also been somewhat useful for people suffering from pancreatic
cancer and in treating people with HIV infection. However, there
have not been any large-scale clinical trials to confirm these
claims.
Dosage Recommendation
Some
medical professionals recommended to take 6–16 grams per day of pure
shiitake mushroom compounds. It can be taken as a soup by boiling it
for 10-20 minutes in water, cooled and strained, or as a decoction.
If preferred, taking 1-3 grams of LEM two to three times a day will
also provide the desired effect.
In Japan purified lentinan
is considered a drug. LEM is unavailable as an herbal supplement in
Northern America.
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