Natural Factors BlueRich Super Strength Blueberry Concentrate - This potent antioxidant super concentrate supports vision and improves blood glucose levels. Blueberry anthocyanins are excellent free radical fighters and blueberries are known for their many health benefits. This 36:1 extract provides 36 times the antioxidant power of fresh berries. Eye health, circulation and memory can all be enhanced with BlueRich, as well as reducing risk of the complications of blood sugar disorders. Blueberry anthocyanins increase capillary integrity, inhibit free radical damage and improve the tone of the vascular system to stimulate better blood flow. This can help prevent diabetic neuropathy which causes eye, kidney and nerve damage.