Vision 20 by Zenith Labs boasts a natural, all-organic ingredient list. They key ingredients are antioxidants that protect and preserve the eye health. Most essentially, antioxidants play a critical role in curbing the damage caused by free-radicals. Antioxidants are also responsible for controlling inflammation that is at the root of numerous health issues. The three vital antioxidants used in this formula are Lutein, Zinc, and Zeaxanthin. These are completely safe for use and show no side effects. Typically, these antioxidants are found in vegetables.