Mushroom powder, Maitake 1 LB (Grifola frondosa)

What the brand says

They are abundant in polysaccharides and polysaccharide-protein complexes that the body uses to fortify the immune system. The mushroom�s beta-glucan content works to promote important immune system functions, effectively activating white blood cells that fight off microorganisms that cause disease, Maitake mushrooms enhance the activity of cells, inducing the production of interleukins and other lymphokines.