As well as vitamins A, B2 and zinc which contribute to the maintenance of normal vision, Visionace Original contains vitamin B1, riboflavin (vitamin B2), B6, C, niacin (vitamin B3) and copper which contribute to the normal functioning of the nervous system. The retina contains one of the highest concentrations of zinc and Visionace Original provides 150% of the recommended daily allowance. Visionace can be used by contact lens wearers or those working long hours at a computer screen. Vitamin A, (vitamin B2) and (vitamin B3) help to maintain normal mucous membranes. The conjunctiva is the thin delicate mucous membrane that covers the front of the eyes and also lines the insides of the eyelids. Visionace Original contains vitamins C and E plus minerals zinc and selenium which contribute to the protection of cells from oxidative stress.