Fungi have many medicinal uses and produce important antibiotics and drugs. Alexander Fleming first discovered penicillin from the fungus Penicillium notatum in 1944. Other fungi produce other antibiotics that are active against bacteria, viruses, and cancer. Fungi also produce statins like lovastatin, used to lower cholesterol. Steroids like cortisone are produced from fungi. Rare fungi have other health benefits, boosting immunity, metabolism, and fighting cancer and diabetes. Many edible mushrooms also have medicinal properties and help fight diseases. Fungi are thus a valuable source of natural medicines.