Solaray Mushroom Herb Complex is a potent mushroom blend of astragalus, chaga, privet, reishi, turkey tail, shiitake, porta and maitake that may help support your immune system health. Mushrooms are a rich source of fiber, protein, and antioxidants. They are rich in the B vitamins, riboflavin, niacin, and pantothenic acid. This mushroom blend is fermented. The fermentation process helps pre-digest the mushrooms, the beneficial compounds, and the nutrients into more bioavailable forms.