Zeaxanthin is one of the most common carotenoid alcohols found in nature. It is synthesized in plants and some micro-organisms. Lutein and Zeaxanthin are found in the macula of the human retina, as well as the human crystalline lens. They play a role in protection against age-related macular degeneration (ARMD) and cataract formation. The antioxidant properties of lutein and zeaxanthin together with ocular antioxidants (selenium, zinc, copper, vitamin A, C, E, etc.) inhibit free radical damage caused by light and oxygen. Zeaxanthin supplements are typically taken on the supposition of supporting eye health. It is is Generally Recognized As Safe by FDA.