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== Función no ollo humano ==
A luteína está concentrada na [[mácula da retina]], unha pequena área da retina responsable da visión central. A hipótese que explica esta concentración natural di que a luteína axuda a manter os ollos protexidos do [[estrés oxidativo]] e dos [[fotón]]s de alta enerxía da luz azul. Varios estudos indicaron que hai unha relación directa entre o consumo de luteína e a [[pigmentación]] macular do ollo.<ref name="Malinow1980">{{Cita publicación periódica |author=Malinow MR, Feeney-Burns L, Peterson LH, Klein ML, Neuringer M |nome=|páxinas=|ISSN=|doi=|revista=|PMC=|título=|data=|apelidos=|title=Diet-related macular anomalies in monkeys |journalurl=Investhttps://www. Ophthalmolncbi. Visnlm. Scinih. gov/pubmed/7409981|volumepmid=19 7409981|issuedate=8August 1980|pages=857–63 |dateissue=August 1980 8|pmidvolume=7409981 19|urljournal=http://wwwInvest.iovs Ophthalmol.org/cgi/pmidlookup?view=long&pmid=7409981 }}{{LigazónVis. mortaSci.|datanúmero=novembro de 2019 }}</ref><ref name="Johnson2000">{{Cita publicación periódica |author=Johnson EJ, Hammond BR, Yeum KJ, et al. |title=Relation among serum and tissue concentrations of lutein and zeaxanthin and macular pigment density |journal=Am. J. Clin. Nutr. |volume=71 |issue=6 |pages=1555–62 |date=June 2000 |pmid=10837298 |url=http://www.ajcn.org/cgi/content/full/71/6/1555}}</ref><ref name="Ref_c">Landrum, J., ''et al.'' Serum and macular pigment response to 2.4 mg dosage of lutein. in ARVO. 2000.</ref><ref name="Berendschot2000">{{Cita publicación periódica |author=Berendschot TT, Goldbohm RA, Klöpping WA, van de Kraats J, van Norel J, van Norren D |title=Influence of lutein supplementation on macular pigment, assessed with two objective techniques |journal=Invest. Ophthalmol. Vis. Sci. |volume=41 |issue=11 |pages=3322–6 |date=October 2000 |pmid=11006220 |url=http://www.iovs.org/cgi/content/full/41/11/3322}}</ref><ref name="Aleman2001">{{Cita publicación periódica |author=Aleman TS, Duncan JL, Bieber ML, et al. |title=Macular pigment and lutein supplementation in retinitis pigmentosa and Usher syndrome |journal=Invest. Ophthalmol. Vis. Sci. |volume=42 |issue=8 |pages=1873–81 |date=July 2001 |pmid=11431456 |url=http://www.iovs.org/cgi/content/full/42/8/1873}}</ref><ref name="Duncan2002">{{Cita publicación periódica |author=Duncan JL, Aleman TS, Gardner LM, et al. |title=Macular pigment and lutein supplementation in choroideremia |journal=Exp. Eye Res. |volume=74 |issue=3 |pages=371–81 |date=March 2002 |pmid=12014918 |doi=10.1006/exer.2001.1126 |url=http://linkinghub.elsevier.com/retrieve/pii/S0014483501911261}}</ref><ref name="Johnson2005">{{Cita publicación periódica |author=Johnson EJ, Neuringer M, Russell RM, Schalch W, Snodderly DM |title=Nutritional manipulation of primate retinas, III: Effects of lutein or zeaxanthin supplementation on adipose tissue and retina of xanthophyll-free monkeys |journal=Invest. Ophthalmol. Vis. Sci. |volume=46 |issue=2 |pages=692–702 |date=February 2005 |pmid=15671301 |doi=10.1167/iovs.02-1192 |url=http://www.iovs.org/cgi/content/full/46/2/692}}</ref>
A luteína pode ter un papel no [[fenómeno entóptico]] chamado [[cepillo de Haidinger]], que permite aos humanos detectar a [[luz polarizada]].
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