- What are zeaxanthin and lutein?
Both are carotenoids; they are the pigments in many fruits and vegetables. Of the more than 600 carotenoids found in nature, only about 20 are found in human plasma and tissue. Of these, only lutein and zeaxanthin are specifically located in the macula of the retina of the eye.
- What do they do?
The density of the macular pigment and the natural protection of the macula and the photoreceptor cells of the retina are increased by the addition of zeaxanthin and lutein in the diet.
- How does that work?
The macula, a tiny area at the center of the retina on the back wall of the eye, is a collection of photoreceptor (light-receiving) cells, mostly cone cells, responsible for turning light into color images. Light generates free radical damage and hits the macula consistently when the eyes are open. The body, in its wisdom, imbues the macula with zeaxanthin and lutein, two powerful carotenoid antioxidants that protect the macula from the free radical damage that would otherwise occur.
- Where do these ingredients come from?
Zeaxanthin and lutein occur naturally in a healthy diet—lutein is found in foods such as broccoli, collard greens, kale, and spinach, zeaxanthin in oranges and corn.