Dietary Supplement Supports Healthy Eye Function What Better Feels Like Vegetarian Laboratory Tested - Purity, Safety & Performance Bilberry Extract provides a potent extract of bilberries. It takes 100 pounds of bilberries to yield one pound of this superior extract. Bilberry Extract is standardized to contain 25% anthocyanin flavonoids, its key compounds. Flavonoids are natural antioxidants, which can disarm damaging free radicals—an important factor for eye health. This formula was developed in accordance with the safety and efficacy standards set forth by the German Commission E, which is the worldwide recognized authority for effective herbal remedies.