The color of an egg yolk is from the xanthophyll carotenoids lutein and zeaxanthin (Photo credit: Wikipedia)
Notice: Optein has been discontinued. See substitute below.
Lutein (Photo credit: Wikipedia)
Optein Lutein promotes eye health and protects the eyes. It also helps decrease night blindness and vision ability in darkness. Lutein is also the main carotenoid antioxidant identified with the lens of the eye and may play a role in the prevention of cataracts. It also found to have specific applications for the eye, in the maintaining optimum eye health whilst preventing macular degeneration.
For alternative source of lutein, click on an image below.