Coriolus versicolor (also known under the names Trametes versicolor, Yun Zhi, Kawaratake and Turkey Tail) is probably the most intensively researched medicinal mushroom in the world, due to its outstanding properties as a biological response modifier.
 
PSP stands for Polysaccharide Peptide, a protein-bound polysaccharide extracted from deep-layer-cultivated mycelia of the COV-1 strain Coriolus Versicolor (Turkey Tail).
 
PSP is not only capable of stimulating the immune system but also modulating mutative cell function and the tissue environment to facilitate the local destruction of mutative cells by activated immune effector cells.
 
Since its discovery in 1971, over 350 scientific and clinical studies have been published demonstrating its potential benefits to a variety of diseases, especially mutation ailment. In China and in Japan, PSP/PSK is currently used as a mutation ailment treatment, in conjunction with surgery, chemotherapy and/or radiation.
It alleviates common and undesirable symptoms suffered by patients during clinical treatments, such as fatigue, poor appetite, adverse pain, anxiety, insomnia, nausea, vomiting, and spontaneous night sweat.