Supports Macular Health - 10 mg LuteinComprehensive Ocular Nutrient FormulaNOW Clinical Strength Ocu Support has been formulated to offer comprehensive nutritional protection for the eyes. Each serving has 10 mg of available Lutein, a critical pigment of the macula, lens, and other ocular tissues. Lutein is a free-radical scavenger related to beta-carotene that defends the eye from the ravages of sunlight. NOW has also included green tea extract, alpha lipoic acid and grape seed extract in this formula to maximize its free radical scavenging potential.