Low-Fat Diets Alone Do Not Reduce Health Risks

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1、Low-FatDietsAloneDoNotReduceHealthRisksOnourprogramthisweek:WetellaboutadiscoverymadeonamountainineasternIndonesia.Wealsowilltalkaboutareportonthevalueofcalciuminthehumandiet.Agolden-mantledtreekangaroo,oneofthecreaturesfoundina'GardenofEden'ontheislandofNewGuineaVOICE

2、ONE:Butfirst,wetellaboutlow-fatdietsandtheireffectsinwomen.(MUSIC)AnAmericanstudyhasexaminedtheeffectsofalow-fatdietonthehealthofwomen.Thestudyfoundthatsuchadietdoesnotreducetheriskofatleastonekindofcancer,heartdiseaseorstroke.Foryears,medicalexpertshavethoughtthatadie

3、tthatislowinfathelpsreducetheriskofcancerandheartdisease.ResearcherswithAmerica'sNationalInstitutesofHealthcreatedastudytotestthistheory.Itisoneofthelargeststudieseverdoneonthissubject.Theresearchersstudiedthehealthofalmostfiftythousandwomenforeightyears.Thesewomenwere

4、betweentheagesoffiftyandseventy-nineyears.VOICETWO:Thewomeninonegroupreducedthefatintheirdiettotwentypercentoftheirtotaldailyfoodsupply.Theyalsoincreasedtheirdailyservingsofvegetables,fruitsandgrains.Anothergroupofwomendidnotmakeanydietarychanges.Theresearcherscompared

5、thetwogroups.Theresultsofthestudyshowthedifferentdietshadlittleeffectonthehealthofthewomen.Bothgroupshadthesameratesofheartdiseaseandcolorectalcancer.Theresearcherssaidthewomenwhofollowedthelow-fatdietmighthavelessriskofbreastcancer.Butthedifferencewassosmallthatitisno

6、tconsideredimportant.VOICEONE:Expertssaytheresultsareimportantforbothmenandwomen.Somecriticsofthestudyfearmanypeoplewillthinkthatdietisnotimportant.Otherstudieshaveshownthatahealthfuldietisstillimportant,butsoareotherchoices.Forexample,exercising,avoidingsmoking,andkee

7、pinganormalbodyweightarealsonecessaryforgoodhealth.Otherexpertsnotedthestudycalledforreducingtotalfatinsteadofthekindsoffatsthatarenothealthful.Forexample,fatsinsomefoodslikefishandnutsareconsideredgoodforhumanhealth.Unhealthfulfatsincludesaturatedandtransfats.Thestudy

8、didnotnotedifferencesbetweenthesetwokindsoffat.Expertsalsosaidthatdietarychangesmightneedtobeginearlierinlifetohaveag