Part used: blueberry fruit Specification: anthocyanin 5% 25% by UV Appearance: blue-purple fine powder Function:          1. The primary function of blueberry extract is to enhance eyeball blood fluxion,protect eyesight, prevent cataract.          2. Anti-aging,enhance metabolism, increase disease resistance.          3. eliminating fatigue,help to sleeping, reducing and adjusting blood pressure, curing coronary heart disease.