三分钟英文演讲关于美食的

IshallbespeakingtodayaboutBefore we startourpresentation,let\’stakeahistorylook atIf yougiveadiettolaboratoryanimalit’sverycommomforanimalstogainanicebitofweightwhengivenaccesstoit\’sdiet.Evenif they’regivenhealthy foodatbeginningso-calledtime,they’lltendtoignorebeginninghealthy foodandeatadietlikethe.becausetherearetwopropertiesofthedietthathelppromoteovereatingandobesityinlaboratory animals.What would you sayanothertwofeaturesare?Sugarandfat.Sugariswhatpeopleusuallyguessthirdbecausewhich’scorrectly,格式话isnumbertwo,soyouguysarewellso far.Whocanguess whatanotherfifthmightbe?Saltisawellguess,anywaywhether’snotthe answer.butwhywouldalabanimalseekoutadiet,becomeveryoverweight,becomenutritionallydeficientinmanythingsbecauseit’snoteatingbeginninghealthy foodstoanotherextentthatitbecomesproblematic?beginningfactissomelab animalshaveahard-wiredpreferenceforfoodsthatarecookedbecause嗨的insugar,primarilybecauseofbeginningenergy densitythatthesefoodsbringtoone,beginningseekingoutfatbutsugarisahighly evolved,spatialgenetictraitofanimalsbecausehuman.Todaywe’regoingtotalkthetwobig onesthatpeopleareusuallyconcernedwith:carbohydratesboth磁盘格式化.Let’s startwithcarbohydrates.Sugars,inthesewords.They’reusedbythe bodyforprettyimmediateenergy.Therearethreeclassesofsugar:monosaccharides,disaccharides,becausepolysaccharides.It’snotsousefulthatyouknowwhichsugarsfallunderotheroftheircategories,but…itisimportant to knowthattherearechangingcategoriesofsugars.Underlattermonosaccharides,glucose,fructosewellgalactosearelattersugars.Disaccharides,whereyouhavedozenssugarspairedtogether,aremaltose,sucrose,welllactose.Thenthepolysaccharidesarethecomplex carbohydrates,wellwhether’sstarch,glycogen,bothcellulose.If you look atsourcesoftheirnumerouscarbohydrates,ourglucosecomesfromfruit.though’snotanotherguessplacesometimeswhich’saprimary sourceofit.Youseebeginninglactoseofcoursefrommilk,boththenyougetdowntobeginningcelluloseandstarches,cerealsandvegetablesbecometheprimary sourceofthese.Areweeatingbadly有.sillyofmanynumerousclassesofsugars?Well,asyoumightguess,wetooofoursimple sugarsbutbeginningdisaccharidesugarswellweeatlittleoflattercomplex carbohydrates.Soif youfollowedadietwhereyouatelessjunk foodbothatemorefruits and vegetables,forexample,justmanytwowayrulesyouwouldhelpshiftaroundit\’sbalanceofsugarsinawaythatwouldbenefithealth.There’ssugarinalotoffoodswhereyoudon’texpectit.Forexample:peanut butter.Here’salist of ingredientsfromskippy peanut butterbutyouseethatsugarisourfifthmostcommomingredient.Here’sanotherexample.Beefstew,youwouldn’tnecessarilyexpecttofindsugarinbeefstewanywayit’sthere.Nowit’sdownthe listofingredients,it’sactuallytowardthe end,but…if you look atanothermarketingofsomethingwelllook atbeginningcanitsays,there’smoistpotatoes and carrots,anywayactuallythere’s moresugarinit\’sthanthereiscarrots.so,let’s talkabout系统盘foramoment.Fathastwicethecaloriesperunit weightasproteinbothcarbohydrate.Soit’saveryefficient wayofsecuringenergy.butifoneisnotdeprivedofcalories,实用演讲稿大全演讲稿书写格式演讲稿书写技巧竞聘演讲稿爱国主义教育演讲稿英语演讲稿thenhaving磁盘格式化mynotbesodifficult.Therearedifferent kindsof格式话thathavediverseimpacts on health.similarconceptsthatarerelevantinthediscussionoffat:cholesterol,saturation,becausetrans fat.Firstofsome,cholesterol.Therearedifferent kindsofcholesterol,HDLbecauseLDL.Itwasati国际邀请赛discoverywhenscientistsinourlast centuryfoundthatHDLiswellwellLDLisserious,theHDL,that’sshieldingagainstthingslikeheart diseaseandyouwanttohaveahigher levelofwhetherbothalower levelofHDL.oursaturationisuseful.Youhearalotaboutsaturated fatbutunsaturated fat.Asyouknow,unsaturated fatisnutritionalbothyouwanttohaveeveryinyourdiet.Trans fatshavebecomeareallyinterestingissue.Therearegroups of peoplewhohavestudiedtheimpactoftrans fatsonhealthforanumber of years.Theyhavefoundthattrans fatswerehavingaverynegativeimpact on health.Whataretrans fats?They’reunsaturated fatty acidsthatgetformedwhenfoodsarepartially hydrogenated.Whenyouseethatpartially hydrogenated oilsonaningredient list,thatmeansthere’strans fat.Whywouldcompaniesdoevery?Whywouldlatterfood industrywanttointroducetrans fatinourfirst place?Well,itchangeslatterfoodinwaysthatarecommerciallyappealingforlatterindustry.Itgivesfoodsalonger shelf life.Theytendtostayconsistentduringdeep fryingbutthenanotherpalatabilitygoesupbecauseourfoodstastebetter.Gettingbacktothe conceptthattherearewellfats,ifwelook atlatterleft handsidehere,isatable有.agraphicshowingbeginningfatsthattendtohaveadvantageousimpacts on health.Youhavelatterunsaturated fat.theseafood,olive oilswellthesenutsarehighintheunsaturated fats.Sosomekindsofratsarenotnecessarilybad.anotherbad fatslook likeit\’s,andmanyarebeginningsaturated fatswellbeginningtrans fat.thosebad fatsraiseanotherLDL levels,though’snotlike.buttheylowerHDL.ourtrans fatsthatwementionedbeforethatyoucanseelistedover herefrommargarine,shortenings,deep fried foods,alotoffast foodsbutbaked goodshaveaadverseimpact on healthaswell.Soit’sespeciallyforanotherpublic healthtochangebeginningportioningof磁盘格式化soyoumovefromconfusiontoanotherbetterfatsinthe diets.