REISHI I CORDYCEPS
Medicinal Mushroom: Trametes Versicolor -
Yunzhi - Turkey Tail - PSP ...
Trametes versicolor (Yunzhi / Turkey Tail / PSP/PSK) — formerly
known as Coriolus versicolor and Polyporus versicolor — is an
extremely common polypore mushroom which can be found throughout
the world. Versicolor means 'of several colours' and it is true
that this mushroom is found in a wide variety of different colours.
T. versicolor is commonly called Turkey Tail because of its
resemblance to the tail of the wild turkey. T. versicolor is
recognized as a medicinal mushroom in Chinese medicine under the
name yun zhi. In China and Japan T. versicolor is used as in
immunoadjuvant therapy for cancer.
The top surface of the cap shows
typical concentric zones of different colours. Flesh 1–3 mm thick,
leathery texture. Cap with rust-brown or darker brown, sometimes
blackish zones, Older specimens, such as the one pictured at right,
can have zones green algae growing on them, thus appearing green.
Commonly grows in tiled layers. Cap flat, up to 8 x 5 x 0.5-1
centimeters, often triangular or round, with zones of fine hairs.
Pore surface whitish to light brown, pores round and with age
twisted and labyrinthine. 2-5 pores per millimeter
The turkey tail has bioremediation
potential, according to mycologist Paul Stamets. T. versicolor
biodegrades a variety of pollutants. It is eaten by the
caterpillars of the fungus moth Nemaxera betulinella and by the
maggots of the Platypezid fly Polyporivora picta.
Main article: Polysaccharide-K
Polysaccharide-K (Krestin, PSK),
is a protein-bound polysaccharide isolated from Trametes
versicolor, which is used as an immune system boosting agent in the
treatment of cancer in some European countries as well as China and
Japan. In Japan, PSK is approved as an adjuvant for cancer
therapy and is covered by government health insurance.
PSK has documented anticancer
activity in vitro, in vivo and in human clinical trials.
Research has also demonstrated that the PSK can reduce
mutagen-induced, radiation-induced, and spontaneously-induced
cancer development. PSK has shown to be beneficial as an
adjuvant in the treatment of gastric, esophageal, colorectal,
breast and lung cancers. Human clinical trials suggest PSK can
reduce cancer recurrence when used as an adjuvant and
research has demonstrated the mushroom can inhibit certain human
cancer cell lines in vitro. Further in vitro studies
have shown that a nutraceutical blend (MC-S) of PSK, lentinan and
other fungal extracts can also inhibit cancer cell
The United States' top ranked
cancer hospital, the MD Anderson has reported that it is a
"promising candidate for chemoprevention due to the multiple
effects on the malignant process, limited side effects and safety
of daily oral doses for extended periods of time."
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