Shiitake mushrooms have been a staple food in many Asian households for many centuries. These mushrooms hold the record as the second most popular and the third most cultivated mushroom in existence today. One might start wondering why this mushroom is so powerful. The reason is not farfetched; shiitake mushrooms have a combination of antiviral, antibacterial, and antifungal properties. They are also potent in fighting inflammations and controlling blood sugar. You can gain all these and more from simply adding shiitake mushrooms to your diet.