Shiitake mushrooms, Lentinus edodes .  Left are Japanese dried shiitake that usually look better and taste better than the Chinese version below. (More)
Shiitake mushrooms are immune system nutrition.  They stimulate immunity.  If you desire a strong immune system be certain to see our video and follow the example set by the fine physicians, pharmacists and herbalists on the tape:  Natural Health with Medicinal Herbs and Healing Foods.