Blue Berry Plus is a food supplement whose ingredients contribute to maintaining correct vision (vitamin A, copper, zinc and eye extract). Blueberries can help maintain eye health by supporting blood vessels and providing antioxidant benefits. Eyebright helps maintain the proper functioning of the retina. Zinc plays a role in maintaining the proper metabolism of vitamin A. Copper, on the other hand, helps maintain proper energy metabolism, and together with zinc helps protect cells against oxidative stress. The product has been enriched with lutein from marigold extract.