A mineral that is required for nutrition and proper function and maintenance of the body. Zinc oxide (80 mg) is one component of the daily nutritional supplementation for treatment to prevent progression of vision loss in AMD (findings from AREDS clinical trial). Zinc oxide is also being tested in a new nutritional supplement formulation for the AREDS II clinical trial. If you use nutritional supplementation, please consult with your personal physician and ophthalmologist as your personal health situation may require monitoring or a non-typical approach and nutritional supplements may interfere with prescribed medicines.