| Section2 = | Section7 = | Section8 = }} Zeaxanthin's one of the two carotenoids contained within the retina of the eye. Within the central macula, zeaxanthin's the dominant component, whereas in the peripheral retina, lutein predominates. As a food additive, zeaxanthin's a food dye with E number E161h. Isomers Lutein and zeaxanthin have identical chemical formulas and are isomers, but they aren't stereoisomers. The main difference between them's in the location of a double bond in one of the… (More on Zeaxanthin)