Edible mushrooms were once considered luxury foods but can now be regularly consumed as part of a healthy diet or used as functional foods or supplements to enhance health. Mushrooms have several distinct parts including the cap, gills, stem, and mycelium. Some common edible mushrooms are button, oyster, shiitake, portobello, wood ear, chanterelle, and truffles. Medicinal mushrooms contain extracts that can supplement the diet to promote health and fitness when consumed as part of a nutraceutical.