Mafuta a chimanga cha fructose (HFCS) ndi shuga wamba nthawi zonse zimakhala zofanana. Zonsezi ndizoipa pa thanzi lanu mukamadya mochuluka chifukwa kudya kwambiri kumodzi kungapangitse kulemera, ndipo ngakhale sweetener alibe phindu lililonse kupitirira calories. Anthu ena amakhulupirira kuti HFCS ndi yoopsa ku thanzi lanu kusiyana ndi shuga wokhazikika, koma zonenazi sizidalira zofufuza za sayansi.
Choyamba, Little Sugar Chemistry
Molekyu uliwonse wa shuga wamba, wodziwika bwino monga sucrose, umapangidwa ndi magawo awiri a shuga omwe amatchedwa shuga ndi fructose. Gulusi ndi shuga thupi lanu limakonda kwambiri mphamvu, ndipo limapezeka mu zakudya zonse zowonjezera komanso zowonjezera zomwe mumadya. Fructose ndi shuga wamkulu wopezeka mu zipatso. Thupi lanu lingagwiritse ntchito fructose monga mphamvu nayenso; zimangofuna ntchito yowonjezera pang'ono.
Shuga onse, kaya shuga woyera, shuga wofiirira, shuga shuga kapena uchi ndi chimodzimodzi - theka fructose ndi hafu ya shuga.
Mafuta a chimanga a fructose amapangidwa kuchokera ku cornstarch, ndipo amapangidwa ndi fructose ndi shuga zinyama. Osati ndendende theka ndi theka, monga shuga, koma pafupi - formulation amachokera pafupi 42 peresenti mpaka 55 peresenti fructose. Mtengo wa fructose ukhoza kukhala "wamtali" poyerekeza ndi madzi omwe amapezeka nthawi zonse (omwe ali otsika kwambiri mu fructose) koma kwenikweni ali ofanana ndi shuga wamba. Choncho, shuga ndi HFCS zili ndi mthupi limodzi lomwe limakhudza thanzi lanu - ndiko kuti, ngati mudya kwambiri, mafuta owonjezerawa amasungidwa monga mafuta.
Nchifukwa chiyani HFCS idachimwa?
Pali zifukwa zingapo izi, zonse zokhudzana ndi kusamvetsetsa kafukufuku. Chifukwa chimodzi chimaphatikizapo kusokoneza pang'ono kwa maphunziro a kafukufuku ndipo wina ndi za kusokoneza mgwirizano ndi chifukwa.
Choyamba, fructose conflation. Zofukufuku zomwe zimagwiritsidwa ntchito ndi zinyama zalabu zimasonyeza kuti kudya zakudya zowonjezera mu fructose kungapangitse kulemera kolemera, insulini kukana, kuthamanga kwa magazi ndi kuthamanga kwapamwamba kwambiri - zinthu zonse zoipa.
Popeza "fructose" imamveka ngati "manyuchi a chimanga cha fructose" ndipo palibe monga "shuga wamba," anthu ena amaphatikizapo awiriwa ndikusankha HFCS ndi owopsa, koma kuti shuga si woipa kwambiri.
Ndizotheka kuti kupeza phindu lalikulu la calories kuchokera ku fructose tsiku lililonse kungapangitse kulemera kolemera kusiyana ndi zakudya zotsekemera zomwe zimachokera ku magwero ena a shuga - osachepera ngati muli kalabu yamaphunziro (maphunziro aumunthu sanavomereze chidziwitso). Koma, bwanji ngati mutangodya fructose kwambiri - chifukwa mumadya chakudya chochuluka? Nanga bwanji ngati fructose zambiri zimachokera ku HFCS chifukwa zimakhala zowonjezera? Izi zimandibweretsa ku chifukwa chachiwiri chowonetsa HFCS, kusokonezeka pakati pa chifukwa ndi mgwirizano.
Mafuta akuluakulu a fructose ndi otchipa kusiyana ndi shuga wokhazikika, choncho amagwiritsidwa ntchito ngati chogwiritsidwa ntchito mu zakudya zowonongeka ndi zakumwa zawonjezeka pazaka makumi angapo apitayo. Pa nthawi yomweyi, kuchuluka kwa kunenepa kwambiri, matenda a mtima, ndi matenda a shuga a mtundu wachiwiri aponso ku United States ndipo anthu ena akudzudzula kuti kuwonjezeka kwa HFCS kukuwonjezeka.
Kuwonjezeka kwamtundu wa caloric kuchokera ku HFCS kungakhale mbali ya vuto - osati chifukwa HFCS imakhala yoipa - koma chifukwa a America awonjezera makilogalamu awo ambiri.
Pachifukwa chimenecho, HFCS ndi mbuzi yokhayokha, ndipo palibe chifukwa chabwino chokhulupirira kuti kusunga shuga monga chogwiritsira ntchito kungapange kusiyana kulikonse.
Nkhondo ya Chakudya - Ndani Wopambana?
Palibe wopambana pano - HFCS ndi shuga wamba nthawi zonse zimakhala zochepa pang'onopang'ono komanso zonse zoipa ngati mutadya kwambiri - koma mofanana; imodzi si yoipa kuposa inayo. Msuzi wochuluka kapena HFCS adzakhala ndi zotsatira zoipa pa thupi mwa kuonjezera magawo a magazi lipids ngati triglycerides ndipo akhoza kuwonjezera kulemera pomuwononga kwambiri.
Kodi ndi zochuluka bwanji? Izi zimadalira zofuna zanu zonse za kalori tsiku ndi tsiku, koma mwinamwake mukhoza kukhala ndi makilogalamu pafupifupi 100 mpaka 200 omwe mungagwiritse ntchito pa magalamu pang'ono a shuga kapena HFCS tsiku lililonse.
Zotsatira:
Forshee RA, Storey ML, Allison DB, Glinsmann WH, Hein GL, Lineback DR, Miller SA, Nicklas TA, Weaver GA, White JS. "Kufufuza mwatsatanetsatane umboni wokhudzana ndi mazira a chimanga a fructose ndi phindu lolemera." Crit Rev Food Sci Nutriti. 2007; 47 (6): 561-82. http://www.tandfonline.com/doi/abs/10.1080/10408390600846457.
Parks EJ, Skokan LE, Timlin MT, Dingfelder CS. "Zakudya zam'thupi zimapangitsa kuti anthu ambiri azikhala ndi asidi ambiri." 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. "Fructose, kulemera kwake, komanso matenda a insulin." Am J Clin Nutr. 2002 Nov; 76 (5): 911-22. http://ajcn.nutrition.org/content/76/5/911.yomwe.
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. "Zotsatira za fructose pa kulemera kwa thupi mu mayesero odyetsa olamulidwa: kuyang'anitsitsa ndondomeko ndi kufotokozera mwachidule." 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. "Kodi shuga yapamwamba imapangitsa kuti thupi liwonongeke kwambiri komanso liwonjezere ngozi ya mtundu wa shuga ndi matenda a mtima?" Zakudya Zakudya Zakudya. 2012; 56. do: 10.3402 / fnr.v56i0.19104. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3409338/.