Lutein

**Semantic type:** Organic Chemical|Vitamin

**Definition:** Lutein (LOO-teen) is a oxygenated carotenoid found in vegetables and fruits. lutein is found in the macula of the eye, where it is believed to act as a yellow filter. Lutein acts as an antioxidant, protecting cells against the damaging effects of free radicals.

**Synonyms:** - (3R,3'R,6'R)-beta,epsilon-Carotene-3,3'-diol - 4-[18-(4-hydroxy-2,6,6-trimethyl-1-cyclohex-2-enyl)-3,7,12,16-tetramethyl-octadeca-1,3,5,7,9,11,13,15,17-nonaenyl]-3,5,5-trimethyl-cyclohex-3-en-1-ol - Adaptinol - All-Trans-Lutein - LUT - LUTEIN - Leutin - Xanthophyll - Xanthophylls