Isiraphu ye-fructose ye-high (HFCS) kanye noshukela ovamile bafana okufanayo, okunomsoco. Zombili zimbi empilweni yakho uma zidla ngokweqile ngoba ukudla okuningi kunakho kungakhuthaza ukuzuza kwesisindo, futhi akukho sweetener kunanoma iyiphi inani lokudla okunomsoco ngaphezu kwama-khalori. Abanye abantu bakholelwa ukuthi i-HFCS iyingozi empilweni yakho kunokushukela ovamile, kodwa lezo zimangalo azisekelwe ekutholeni kwesayensi.
Okokuqala, i-Little Sugar Chemistry
I-molecule ngayinye yeshukela evamile, eyaziwa ngokuthi i-sucrose, iqukethe ama-sugar units angama-single abizwa ngokuthi i-glucose ne-fructose. I-glucose yishukela umzimba wakho othanda kakhulu amandla, futhi utholakala kuwo wonke ukudla okuneshukela noshukela odlayo. I-Fructose yi-ushukela otholakala ezithelo. Umzimba wakho ungasebenzisa i-fructose njengamandla futhi; kudinga nje umsebenzi omncane owengeziwe.
Yonke ushukela, noma ushukela omhlophe, ushukela obomvu, ushukela owodwa noma uju ufana ne-fructose nengxenye ye-glucose.
Isiraphu ye-fructose ye-high ikhiqizwa kusuka e-cornstarch, futhi iyenziwe nama-molecule we-fructose ne-glucose. Akuyona ncamashi isigamu nengxenye, njengoshukela, kodwa ama-formulations asondelene ukusuka ku-42% kuya ku-55% we-fructose. Inani le-fructose lingase libe "phezulu" uma kuqhathaniswa nesiraphu evamile yamabele (okuyinto empeleni ephansi e-fructose) kodwa empeleni ifana neshukela evamile. Ngakho-ke, kokubili ushukela kanye ne-HFCS ine-metabolism efanayo kanye nomthelela ofanayo empilweni yakho - okungukuthi, uma udla kakhulu, amakholori engeziwe athathwa njengamafutha.
Ngakho kungani i-HFCS idonswa?
Kunezizathu ezimbalwa zalokhu, kokubili okuhlobene nokucwaninga okungaqondakali. Esinye isizathu sihilela ukungaboni kahle kokucwaninga kwezifundo zocwaningo kanti enye iphathelene nokuhlanganiswa kokudideka nokubangela.
Okokuqala, ukungcola kwe-fructose. Izifundo ezenziwe ngezilwane zelabhu zikhonjisiwe ukuthi ukudla ukudla okuphezulu e-fructose kungaholela ekutheni uzuze ngokweqile, ukuvimbela i-insulini, ukucindezelwa kwegazi eliphezulu kanye ne-triglycerides ephezulu - zonke izinto ezimbi.
Njengoba "i-fructose" izwakala kakhulu "njenge-sulfur ephezulu ye-fructose" futhi ayikho into efana ne "ushukela ovamile," abanye abantu bahlanganisa lezi ezimbili futhi banqume ukuthi i-HFCS iyingozi, kodwa ukuthi ngandlela-thile ushukela akuyona into embi kakhulu.
Kungenzeka ukuthi ukuthola iphesenti enkulu yamakholori akho kusuka ku-fructose nsuku zonke kungabangela ukuzuza kwesisindo kunamakholori adliwe kwezinye izithombo zoshukela - okungenani uma ungumlingani webhule (ukuhlolwa kwabantu akusekelanga leso simangalo). Kodwa-ke, kuthiwani uma nje udla i-fructose ngokweqile - ngoba udla ukudla okuningi kakhulu? Futhi kuthiwani uma okuningi kwalolu fructose livela ku-HFCS ngoba kwenzeka ukuthi isithako esivamile? Lokhu kungilethela kwesizathu sesibili sokudemeza i-HFCS, ukudideka phakathi kwesizathu nokulungiswa.
I-fructose ephezulu ye-corn isiraphu ishibhile kunokushukela ovamile, ngakho isetshenziswe njengesithako ekudleni okusetshenzisiwe kanye neziphuzo zanda eminyakeni embalwa edlule. Phakathi naleso sikhathi esifanayo, izinga lokukhuluphala ngokweqile, isifo senhliziyo, kanye nohlobo lwesibili lwesifo sikashukela selukhuphukile e-United States kanti abanye abantu basola ukuthi ukwanda kwe-HFCS kwenyuka ngesikhathi esifanayo.
Ukwandiswa kwe-caloric kusuka ku-HFCS kungase kube yingxenye yenkinga - hhayi ngoba i-HFCS ibukeka bubi - kodwa ngoba ama-America akhulise amakholori ajwayelekile.
Kulokho, i-HFCS ingumgogodla, futhi akukho sizathu esihle sokukholelwa ukuthi ukunamathela koshukela njengesithako kungenza umehluko.
Ukulwa kokudla - Ubani onqobayo?
Akekho omnqobile lapha - i-HFCS kanye noshukela ovamile zilungile ngokulingana okuncane futhi kokubili kubi uma udla kakhulu - kodwa ngokulinganayo; enye ayimbi nakakhulu kunomunye. Ushukela oluningi kakhulu noma i-HFCS iyoba nomthelela omubi emzimbeni ngokukhulisa amazinga wegazi lipids afana ne-triglycerides futhi ingafaka isandla ekuzuzeni isisindo uma udla kakhulu.
Kuningi kangakanani? Lokho kuxhomeke kuzidingo zakho zansuku zonke zekhalori, kodwa kungenzeka ukuthi unama-calories angama-100 ukuya kwangu-200 angama-discretionary ongawasebenzisa kumagremu amancane ushukela noma i-HFCS nsuku zonke.
Imithombo:
Forshee RA, Storey ML, Allison DB, Glinsmann WH, Hein GL, Lineback DR, Miller SA, Nicklas TA, Weaver GA, White JS. "Ukuhlolwa okubalulekile kobufakazi obuhlobene ne-fructose high isiraphu ye-corn nesisindo somzimba." Crit Rev Rev Food Sci Nutr. 2007; 47 (6): 561-82. http://www.tandfonline.com/doi/abs/10.1080/10408390600846457.
Ipaki EJ, uSkokan LE, Timlin MT, iDingfelder CS. "Ushukela wesidlo uvuselela ama-fatty synthesis kubantu abadala." J Nutriti. 2008 Jun; 138 (6): 1039-46. http://jn.nutrition.org/content/138/6/1039.
Elliott SS, Keim NL, Stern JS, Teff K, Havel PJ. "I-Fructose, inzuzo yesisindo, nesifo se-insulin syndrome." I-Am J Clin Nutr. 2002 Nov; 76 (5): 911-22. http://ajcn.nutrition.org/content/76/5/911.full.
Sievenpiper JL, de Souza RJ, Mirrahimi A, Yu ME, Carleton AJ, Beyene J, Chiavaroli L, Di Buono M, Jenkins AL, Leiter LA, Wolever TM, Kendall CW, Jenkins DJ. "Imiphumela ye-fructose ngesisindo somzimba ekuhlolweni kokudla okulawulwayo: ukubuyekezwa okuhleliwe nokuhlaziywa kwe-meta." U-Ann Intern Med. 2012 Feb 21; 156 (4): 291-304. http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0034296/.
Sonestedt E, Overby NC, Laaksonen DE, Birgisdottir BE. "Ingabe ushukela ophezulu usondeza izifo ezingezinhle ze-cardiometabolic futhi ukwandisa ingozi ye-type 2 yesifo sikashukela nesifo senhliziyo?" Ukudla okunomsoco wokudla. 2012; 56. doi: 10.3402 / fnr.v56i0.19104. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3409338/.