Blueberry is rich in antioxidant vitamins A, C, E and B-carotene, sugar, potassium, magnesium, phosphorus, inorganic acids, metal salts, pectin and fiber. In contrast Blueberry is low in sodium, fat and calories. Therefore it is a natural high energy food that keeps the  body healthy and youthful.  Known as a source of eternal youth, current studies report  benefits for their antioxidant activity, anti-aging, cancer prevention, heart and brain function, vision health and improvement of urinary tract.