Blueberry extract is a kind of dark purple or purple fine powder extracted from blueberry fruit. It has a bitter taste. The commodity is labeled with the content of blueberry proanthocyanidins, blueberry fruit, leaves and pomace are rich in anthocyanins, flavonoids, polyphenols and polysaccharides and other bioactive substances, are natural antioxidants. Has the protection eyesight, prevents the blindness; To strengthen the blood vessels of the brain, to prevent the pathological changes of the blood vessels of the brain, to strengthen the blood vessels of the myocardium, to strengthen the coronary arteries, to strengthen the blood vessels of the kidneys, to prevent the rupture of the capillary of the glomerulus and the occurrence of hematuria, urethritis and cystitis; Strengthen veins, prevent varicose veins, prevent ulcers, prevent arteriosclerosis, and prevent the formation of blood clots.