We use vigorous testing and quality assurance to make sure that you're getting pharmaceutical grade supplements. Zinc-Free MACULAR SUPPORT VITAMINS based on AREDS 2 study has lutein and zeaxanthin, for those needing a zinc-free solution to further support macular health. We keep up with the latest research and science to ensure you keep the best possible vision you can. Because slightly varying supplement formulations may be necessary depending on your genetics and lifestyle, be sure to see your doctor with any questions and concerns you may have.