Turkey tail (Coriolus versicolor) is a medicinal mushroom. Its extract is standardized for polysaccharopeptides, mainly polysaccharide-K (PSK) and polysaccharide-P (PSP). These compounds modulate immune activity. In Japan, PSK is a prescription medicine used alongside conventional cancer care. This supplement is not a disease treatment.
People take turkey tail extract to support immune health, particularly during seasonal changes or stressful periods. Doses in supplements are lower than therapeutic prescription amounts, so follow the label directions.
Because turkey tail stimulates the immune system, anyone with an autoimmune condition (such as lupus or rheumatoid arthritis) should consult a healthcare provider before use.