Ecebile ngama-isoflavone, ubhontshisi wesoya angase abe usizo kwabesifazane abanenkinga yokukhipha amakhilogremu engeziwe ngesikhathi sokunqamuka kokuya esikhathini, basikisela ososayensi ucwaningo lwabo olwanyatheliswa kuyi-Journal of Obstetrics & Gynecology.
Ukuncipha kokukhiqizwa kwe-estrogen ehambisana nokunqamuka kokuya esikhathini kungase kubangele izifo eziningi, okuhlanganisa ukukhathala noma ukushisa okushisayo, futhi ukuncipha kwe-metabolism kuvumela ukunqwabelana kwezicubu ze-adipose. Sekuyisikhathi eside ososayensi besola ukuthi isoyi ingase ibe nomthelela ekwehliseni izimpawu zokunqamuka kokuya esikhathini ngenxa yezakhiwo zayo, kodwa ucwaningo kuze kube manje alukakuvumeli ukwenza iziphetho eziqinile.
Ucwaningo lwakamuva olwenziwa abacwaningi eNyuvesi yase-Alabama, eBirmingham, luhilele abesifazane abangu-33, kuhlanganise nabesifazane abangu-16 base-Afrika baseMelika, abaphuza i-smoothie yansuku zonke izinyanga ezintathu eziqukethe ama-milligrams angu-160 we-soy isoflavones nama-20 amagremu we-soy protein. Abesifazane eqenjini elilawulayo baphuza ama-milkshakes aqukethe i-casein.
Ngemva kwezinyanga ezintathu, i-computed tomography yabonisa ukuthi abesifazane abaphuza i-soy smoothies babe nokuncipha kwamafutha ngo-7,5%, kuyilapho abesifazane abathatha indawo ye-placebo benyuke ngo-9%. Ngesikhathi esifanayo, kwaqashelwa ukuthi abesifazane base-Afrika baseMelika balahlekelwa isilinganiso esingu-1,8 kg wamafutha omzimba, kuyilapho abesifazane abamhlophe balahlekelwa amafutha esiswini.
Abalobi bocwaningo bachaza umehluko, noma kunjalo, ngokuthi kwabesifazane abamhlophe, amafutha amaningi avame ukugcinwa okhalweni, ngakho-ke imiphumela yokwelashwa ibonakala kakhulu lapha.
Kodwa-ke, uDkt. Oksana Matvienko (University of Northern Iowa) uyangabaza ngalezi ziphetho, eveza ukuthi ucwaningo lwalufushane kakhulu nokuthi bambalwa kakhulu abesifazane ababambe iqhaza kulo. Ocwaningweni lwakhe, uMatvienko walandela abesifazane abangama-229 esikhathini esingangonyaka abathatha amaphilisi aqukethe amamiligremu angama-80 noma ayi-120 wesoya isoflavone. Kodwa-ke, akazange aqaphele izinguquko ezihlobene nokulahlekelwa kwamafutha uma kuqhathaniswa neqembu le-placebo.
U-Matvienko uyaphawula, nokho, ukuthi i-computed tomography izwela kakhulu kune-x-ray esetshenziswe ocwaningweni lwakhe, ngakho-ke abacwaningi baseNyuvesi yase-Alabama bangase baqaphele izinguquko ezingazange zibonwe yiqembu lakhe. Ukwengeza, umehluko emiphumeleni ungachazwa yiqiniso lokuthi ezifundweni ezedlule, abesifazane banikezwa ama-isoflavones kuphela, futhi ezifundweni zamanje namaprotheni e-soy.
Bobabili abalobi bezifundo zakamuva kanye nezangaphambilini baphetha ngokuthi akucaci ukuthi imiphumela yesoya ingathuthukisa kakhulu impilo yabesifazane ngesikhathi nangemva kokuya esikhathini (PAP).