Lutein is a carotenoid, a natural antioxidant and a free radical scavenger found in highest levels in the eye. The eye is continually subjected to oxidative stress due to light exposure and retinal metabolism, and research indicates that Lutein's chemical properties may retard the onset of degenerative and harmful effects in the eye.

Additional epidemiological studies point to Lutein's possible role in supporting breast, colon and skin, health, heart health and immune health.

Astaxanthin is another carotenoid antioxidant, surpassing both Vitamin E and Beta-Carotene in the delay of lipid peroxidation and cellular oxidation. Like lutein, astaxanthin may help eye health.

Zeaxanthin specifically acts to protect the retina from harmful effects of sunlight. Macular pigment, which is composed of Lutein and and Zeaxanthin, is believed to act like a pair of "sunglasses." Increased levels of Zeaxanthin may be associated with sustained visual acuity.

Lutein, Zeaxanthin, Astaxanthin have incredible potential as nutritional powerhouses. Intensive Nutrition's Lutein formula enhances the antioxidant properties of these carotenoids by combining them with L-Leucine, an amino acid that promotes bioavailability and absorption of nutrients.