Description_x000D_ General description_x000D_ Xanthophylls are oxygenated derivatives of carotenoids. It consists of oxygen atoms. Xanthophylls are yellow pigments and are found majorly in the leaves of most green plants._x000D_ Application_x000D_ Xanthophyll has been used:_x000D_ • to quantify circulating lutein in birds_x000D_ • to study its effect on the synthesis of factor D (FD) by adipocytes_x000D_ • for the quantification of carotenoids from the leaves of Brassica oleracea_x000D_ Packaging_x000D_ 1, 5 mg in glass bottle_x000D_ Biochem/physiol Actions_x000D_ Xanthophyll/Lutein functions as an accessory light-harvesting pigment. It also acts as quenchers of singlet oxygen and chlorophyll triplet states to exhibit protection against photooxidative damage. Xanthophyll is involved in photosynthesis. It has antioxidant properties._x000D_ Dietary carotenoid with no vitamin A potency. Increases macular pigment concentration in the eye and may improve visual function._x000D_ Packaging_x000D_ Dry powder packed under Argon._x000D_ Quality_x000D_ Minimum 70% total carotenoids as xanthophyll._x000D_ Other Notes_x000D_ Tandem Mass Spectrometry data independently generated by Scripps Center for Metabolomics is available to view or download in PDF. X6250.pdf Tested metabolites are featured on Scripps Center for Metabolomics METLIN Metabolite Database. To learn more, visit sigma.com/metlin.