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1、黑巧克力美味健康两相宜Chocoholicsarerejoicingamidaproliferationofnewscientificevidenceshowingcocoamaybegoodfortheheart.Butmostchocolateispackedwithcaloriesandunhealthysugar.Awaveofnewproductswithhighlevelsofpurecocoaisbeingmarketedasawaytoenjoychocolate'sbenefitswithou
2、temptycalories.巧克力控们要高兴了,因为一组最新的科学证据表明可可可能对心脏有好处。不过,以往市面上大部分的巧克力卡路里和含糖量都偏高。如今,一批批含高纯度可可的巧克力新品陆续上市,让人们在享受到巧克力所带来的美味和健康的同时,完全不用担心空热量的问题。Thecocoabean,actuallyaseed,growsinpodsontrees.Itcontainscompoundscalledflavanols,whichhavebeenshowntolowerbloodpressure,impr
3、ovebloodflowandreduceoverallriskofheartdisease.Threescientificanalysespublishedinthepastsixmonthspooledresultsofsmallerstudiestoconcludethatcocoaisgoodfortheheart.Scientistsbelieveflavanolswork,atleastinpart,bystimulatingproductionofnitricoxide,whichrelaxesv
4、esselsandimprovesbloodflow.可可豆(实际上就是可可子)生长在可可树的豆荚中。可可豆含有黄烷醇,该物质有助于降血压、促进血液流动并降低罹患心脏病的风险。过去六个月内发表的三项科学研究通过对多项小型研究结果进行综合分析,推断出可可有益心脏的结论。科研人员认为,黄烷醇可以刺激一氧化氮的产生,而一氧化氮可以放松血管、促进血液流动,因此至少从这一点来看,黄烷醇是有功效的。Thecatch,saysDavidL.Katz,directorofYaleUniversity'sPreventionRe
5、searchCenter,isthatexactlyhowmuchchocolateisneededforahealthbenefitisn'tknown.'Chocolateisaconcentratedsourceofcalories,soit'simportanttokeepthedosewithintherapeuticrange,'hesays.耶鲁大学预防研究中心(YaleUniversity’sPreventionResearchCenter)主任大卫·卡茨(DavidL.Katz)表示,问题在于
6、具体该摄入多少巧克力才对人体健康有益还不清楚。他称,“巧克力含热量高,所以将摄入量控制在对健康有益的范围内是很重要的。”Mostchocolateisn'tlabeledwithmilligramsofflavanolsandthere'snoindustryorscientificstandardyetformeasuringflavanolsinchocolate.Oneobjectivemeasureisthecocoapercentageonthelabel.Milkchocolatecanbeasli
7、ttleas10%cocoapastebyweight,withtherestinsugar,milkandotheringredients.Dark-chocolatebarstypicallycontain50%to60%cocoabyweight,scientistssay.大多数巧克力产品并不标注出黄烷醇的具体含量,到目前为止也还没有可据以测量巧克力中黄烷醇含量的行业或科学标准。比较客观的一个指标是标签上的可可含量。科研人员表示,按重量计算,牛奶巧克力中的可可含量可能只有10%,其余均是糖、牛奶和其他配
8、料。而黑巧克力中的可可含量一般在50%-60%。'Thehigherthepercentageofcocoa,thehighertheflavanolcontent,thehighertheantioxidantcontentandthuswebelievethegreaterpositivehealthbenefit,'saysWashington,D.C.,nutritionist