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（每日一读）高考英语考前突破 阅读理解能力 文化教育 喝咖啡能拯救视力素材 .doc

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喝咖啡能拯救视力Adailycupofcoffeecansaveyoureyesightscientistsclaim.科学家称每日一杯咖啡可以拯救你的视力。Achemicalfoundinthedrinkpreventsdeterioratingeyesightandpossibleblindnessfromretinaldegenerationduetoglaucoma（青光眼）ageinganddiabetes.ResearchersatCornellUnivesityinNewYorkwerelookingatcoffee'santioxidanteffectswhentheymadethediscovery.Coffeecontains1percentcaffeinebutbetween7and9percentchlorogenicacid（绿原酸）whichisastrongantioxidant.ThestudypublishedintheJournalofAgriculturalandFoodChemistryfoundthatinmicethisacidpreventedretinaldegeneration.ChangY.Leeaprofessoroffoodscienceandthestudy'sseniorauthorsaid:'Theretinaisathintissuelayerontheinsidebackwalloftheeyewithmillionsoflight-sensitivecellsandothernervecellsthatreceiveandorganisevisualinformation.'Itisalsooneofthemostmetabolicallyactivetissuesdemandinghighlevelsofoxygenandmakingitpronetooxidativestress.'Thelackofoxygenandproductionoffreeradicalsleadstotissuedamageandlossofsight.'Headded:'Thestudyisimportantinunderstandingfunctionalfoodsthatisnaturalfoodsthatprovidebeneficialhealtheffects.'Coffeeisthemostpopulardrinkintheworldandweareunderstandingwhatbenefitwecangetfromthat.'PreviousstudieshaveshownthatcoffeealsocutstheriskofsuchchronicdiseasesasParkinson'sprostatecancerdiabetesAlzheimer'sandage-relatedcognitivedeclines.