Superfeast Turkey Tail is used by Taoists to support a robust immune system, Turkey Tail is also beneficial for boosting Qi (Chi), supporting bone health, liver health, and gut health. Revered as a potent tonic herb on nearly every continent, turkey tail is high in the protein-bound polysaccharides PSK and PSP, which is thought to explain its support for both surface and core immunity. 100% pure mushroom - absolutely no fillers, preservatives or additives of any kind used.