Numerous peer-reviewed studies link the important eye-health benefits of the natural antioxidant lutein with reducing the risk of age-related macular degeneration. Research has also suggested a reduced risk of cataract extraction with increased lutein intake. Sourced from marigold flowers and purified from marigold flower oleoresin, FloraGLO Lutein is the world's leading patented, purified lutein. Products with FloraGLO Lutein contain the same lutein naturally found in dark green leafy vegetables as well as eggs. Lutein, present in the macula of the eye's retina, appears to filter harmful, high-energy blue wavelengths of visible light from both natural sunlight and indoor light. Lutein also appears to quench free radicals that may lead to oxidative stress and cell damage in certain eye tissues. Studies indicate that daily intake of 6 mg to 10 mg may be beneficial for eye health.