Coriolus versicolor (Turkey tail mushroom, trametes versicolor, kawaratake, yun-zhi) is probably the best documented medicinal mushroom. Derived from Coriolus versicolor, known as polysaccharide-K (PSK or PSP), is used in some countries as an adjunctive therapy for patients undergoing chemotherapy for cancer. PSP in China and PSK in Japan, both mushroom extracts are government 

registered anticancer drugs, commonly used as a supplement to surgery, radiation and chemotherapy

Ganoderma lucidum (Língzhi, reishi, mannentake) mushrooms can be found in many herbal remedies. Cellular and animal research has shown Ganoderma may contain anticancer and immune system enhancing properties. Researchers have noted Ganoderma appears to have antibacterial, antiviral, and antifungal properties. Animal studies have noted Ganoderma may protect the live and protect against radiation.

Grifola frondosa (Maitake, hen-of-the-woods) is an edible mushroom commonly found on oak trees. In 2009, a systematic review published by the Massachusetts General Hospital, stated randomized controlled trials were warranted to investigate maitake in cases of cancer, diabetes, and for altering the immune response. Maitake may partially inhibit the enzyme cyclooxygenase and aspects of angiogenesis.

Cordyceps (Caterpillar fungus, dong chong xia cao) is an herbal remedy with a long history in China according to a review by the Stanford University of Medicine. The fungus is parasitic to insects. Research has indicated Cordyceps may promote vasodilation, cellular health, have anti-depressant activity, as well as possible anti-cancer activity.

Science: The Pharmacological Potential of Mushrooms

Benefits of medicinal mushrooms

Medicinal Mushrooms have been known for centuries to have many valuable medicinal properties. It has been shown that they improve immune systems in both people and, as a result of a recent study, dogs. They help to slow the growth of tumors and in some cases reduce their size. It also increases appetite while undergoing chemotherapy treatment as well as increasing energy levels.