Chaga is rich in superoxide dismutase (SOD), an enzyme which converts the superoxide ion to less toxic hydrogen peroxide and is produced by a healthy immune system. SOD is an antioxidant that repairs cell damage from free radicals. Chaga has more SOD than fish oils, barley grass, and vitamins E and C. Recent research has proven chaga mushrooms are the "heavyweight champion" of all antioxidants that knocks açaí, pomegranate, and blueberry.