Chokeberries have the highest concentration of antioxidants of any fruit. They have the highest ORAC (Oxygen Radical Absorbance Capacity) value of any fruits. Chokeberries contain plenty of vitamin C, B1, B2, B6, E, PP, minerals and antioxidants. Its high content of bioflavonoids and rutin makes it helpful in strengthening the blood vessels. It boosts the immune system and helps protect the cells against damage caused by free radicals. It is also rich in anthocyanins, which are powerful antioxidants. It has been used for centuries by the Siberian or North American people, who used to believe it is a natural youth elixir.