Coriolus versicolor (Turkey Tail Mushroom) is a common polypore mushroom found throughout the world. It is flat and multi-colored and resembles a turkey's tail. Coriolus versicolor (Turkey Tail Mushroom) boasts many health-boosting benefits. Turkey Tail is commonly taken as a psk supplement, because it contains biological compounds that support immune function, such as polysaccharopeptide, polysaccharopeptide K, and Coriolus versicolor glucan. It is rich in polysaccharides, a type of fiber that helps support digestion, and helps support the colon, and is loaded with antioxidants.