Lutein and zeaxanthin are the two major carotenoid pigments stored in the macula, the central part of the retina. They promote the integrity and density of the macular pigment, in part through their antioxidant properties.1
In addition, they help form a protective layer that filters light, maintaining healthy photoreceptor function in the macula.2 Higher dietary intake of these carotenoids is associated with increased macular concentration.3 Numerous double-blind, placebo-controlled trials indicate that lutein and zeaxanthin support the health of the optical lens as well as the retina.4
Additionally, research shows that the combination may target different areas in the retina to enhance total retinal health, photoreceptor health and color vision.5‡
References
- Rodriguez-Carmona M, et al. Ophthalmic Physiol Opt. 2006 Mar;26(2):137-47.
- Bovier ER, et al. PLoS One. 2014 Sep 24;9(9):e108178.
- Schalch W, et al. Arch Biochem Biophys. 2007 Feb 15;458(2):128-35.
- Huang YM, et al. Br J Ophthalmol. 2015 Mar;99(3):371-5.
- Hammond BR, et al. Invest Ophthalmol Vis Sci. 2014 Dec 2;55(12):8583-9.
