Shitake, enoki, and other exotic mushrooms have cancer fighting properties. Shitake mushrooms contain a high amount of lentinan that helps your body produce immune system cells to help prevent infection and even cancer. In Japan, lentinan is a cancer treatment. It is said that 3-5 oz. of mushrooms a day inhibit tumor growth.
They are a good source of potassium, riboflavin, niacin, and selenium. Selenium is one of the latest additions to the anti-cancer nutrient list.