For centuries, a mushroom has been a part of medicines. The west has now discovered and marketed mushrooms as a miracle food. In earlier times, mushrooms treated anything from asthma to gout. Mushroom is called food fit for the gods because of the variety of nutrients. Mushrooms are preventive cancer medicine. There are around two thousand species of edible mushrooms. Only a few mushrooms like shitake, maitake, button mushrooms, etc., are popular.