Mushrooms have been around for millions of years, and certain ones offer support for the immune system. These immune-supporting mushrooms have a common attribute: polysaccharides. Our M/R/S Mushroom supplement contains polysaccharides from maitake, reishi and shiitake—a trifecta of mushrooms believed to promote optimal immune system function. What’s more, they also promote overall physiological health—this includes the liver, heart, and cellular health support.‡