It is known that eating a small amount of this fruit every day will enhance your life expectancy, and at the same time keep you terrific shape. Experts say that by drinking two ounces of goji juice daily for only three weeks, your immune system is given a major boost to fend off infections. The goji berries also help slow down the aging process with its powerful antioxidants, build up the immune system and the heart. This is one of natures greatest fruits.