Go with your gut... and support digestive health naturally with Host Defense Turkey Tail. One of the most-studied and best-documented beneficial mushroom species in scientific research, Turkey Tail (Trametes versicolor) has a wide spectrum of beneficial properties and is best-known for supporting immunomodulation and an engaged and balanced immune response. And with important enzymes and prebiotics, Turkey Tail has been shown to support beneficial microflora in the digestive and gastrointestinal ecosystem.*