Mushrooms (Lentinus edodes) are a globally popularfood because of their good flavor, taste, and nutritionaland health benefits. Studies on nutritional compositionsof mushrooms have been extensively reported.[1,2]Thehealth benefits in mushrooms are believed to be affectedby their growing environments, especially for mineralelements.[3]Superoxide dismutase (SOD) is another impor-tant active compound in mushrooms, and SOD in mostinvestigated mushrooms possessed high bioactivities withhigh thermal stability (40–95% activity remained after90C treatment for 10 min), which implies that theprocessed mushrooms might still have high amounts ofbioactive compounds.[4]Research also showed that mush-room polysaccharides have antioxidant, anti-cancer, andimmune functions[5]that enable them as potential resourcesfor the development of nutraceuticals or functional foods.Infrared radiation (IR) is a widely used drying tech-nology in many industries, including the food industry.[6]When IR is used to heat or dry wet materials, the infraredwave penetrates through the materials and is converted