I-BPA, okanye i-bisphenol-A, yikhemikhali efumaneka kwezinye iiplastiki kunye ne-epoxy resins. Ukuba ukhangele inombolo yesi-7, uya kukwazi ukuba iplastiki oyisebenzisayo iqulethe i-BPA. I-BPA inokufumaneka nakwezinye izibophelelo zamazinyo, izilwanyana zokutya ezinomsolo, iibhotile zentsana kunye nezixhobo zonyango.
Amajelo amaninzi azisa ingxelo malunga neengxaki malunga ne-BPA, kwaye unokufumana iibhotile zamanzi ezingabhalwa nge-BPA (ngokuqhelekileyo ngexabiso eliphezulu) kwiindawo ezininzi zokuthengisa iimpahla.
Ngaba ezi mveliso ze-BPA zifanelekile? Ngaba i-BPA ingozi kwimpilo yakho?
Nantsi i- UpToDate , inkcazo yekhompyutheni yoogqirha kunye nezigulane, kufuneka uthethe nge-BPA:
"Ukukhathazeka ngemiphumo yempilo efumaneka kwizifundo zezilwanyana ezibonisa ukuba i-BPA iyasebenza njenge-estrogen ebuthakathaka emzimbeni kwaye inokuba nefuthe kwiinkqubo ze-biological kumaxabiso aphantsi. Ngokomzekelo, uphando lwezilwanyana luchaze ukuba amazinga aphantsi okuchithwa kwi-BPA ngexesha lophuhliso angenza ukuba utshintsho ukuziphatha, ingqondo, i-prostate gland, i-mammary gland, kunye nexesha apho izilwanyana zezilwanyana zifumana ukukhula.
Ucwaningo lwe-epidemiological luye lwaphakamisa iimpembelelo zempilo yabantu, kuquka isifo sikashukela, isifo senhliziyo, ubunzima besibindi, kunye neparameters ezingavamile.
Estrogen kunye neBPA
I-BPA yinto eyaziwayo ye-endocrine. Ama-endocrine abaphazamisayo ayenemichiza echaphazela ama-hormone emizimbeni yethu, mhlawumbi ngokuphazamisana nendlela abasebenza ngayo emzimbeni okanye ngokuxelisa ama-hormone emzimbeni.
I-BPA ifana ne-estrogen, i-hormone ebalulekileyo yokuzala. Nangona i-estrogen idlalwa ngokuba yi-hormone yabesifazane, i-hormone ibalulekile kubo bobabini nabasetyhini.
I-BPA yenza njenge-estrogen ebuthakathaka emzimbeni, kwaye ubuncinci kwizifundo zezilwanyana, kufunyenwe ukuba nefuthe nakwizinga eliphantsi. Uphando lufumene ukuba xa izilwanyana zibonakaliswe kwi-BPA kwizigaba eziphambili zophuhliso, umngcipheko weempembelelo ezimbi ungaphezulu.
Oku kubandakanya isigaba somntwana kunye nesantya sezilwanyana.
BPA kubantu
Asiyazi ukuba izifundo zezilwanyana zibonisa indlela abantu abaya kuphendula ngayo kumazinga eBPA. Nangona kunjalo, kukulungele ukuba uqaphele xa kunokwenzeka, kwaye iNational Institute of Environmental Sciences (NIEHS) ibonisa ukuba ukuphepha ukukhutshwa kweBPA xa ukhulelwe okanye uncelisayo.
Kodwa kuthekani malunga nokukhutshwa kwe-BPA? Ngaba unokukhokelela kwiingxaki zokuzala? I-NIEHS ibika ukuba ngokucwaninga okwangoku, kukho ukukhathazeka okungenakunyanzeliswa kwe-BPA eyonakalisa ukuvelisa kubantu abadala, abangasebenzi kunye nemveliso ye-BPA kwindawo yokusebenza. (Kwabo basebenza ngokuchanekileyo ne-BPA materials, bayalinganisa umngcipheko njengento encinci.)
Ezinye izifundo ezincinci zifumene unxibelelwano olunokwenzeka phakathi kwe-BPA kunye nokuzala. Kwisifundo esithile, amadoda anamazinga athathekayo e-BPA emcinini wawo ayenokuphindwa kathathu ukuba abe nesisombululo esincinane se-sperm kunye nobunzima bentlobo, ngaphezu kwamaxesha amane kunokuba nesibalo esincinane sembewu, kwaye ngokuphindwe kabili ukuba ne-sperm motility ( ibhinqa ibhukuda). Olu pho nonongo lubandakanyeke kumadoda asebenza kunye ne-BPA kwiifekthi, kwaye ke kuyacaca ukuba oku kuya kuhambelana njani namadoda awazange asebenze kunye ne-BPA kwisimo somsebenzi.
Kwisifundo esincinane esakhangela abafazi abahamba nge- IVF , abaphandi bafumanisa ukuba amanqanaba aphezulu e-BPA, amanqanaba angaphantsi kwe-estradiol aphezulu. Bafumanisa ukuba amaqanda ambalwa athatyathwa kubasetyhini abanamazinga aphezulu e-BPA.
Ngenxa yokuba ezi zifundo ziye zincinci ngobukhulu, nangona kunjalo, akucaci ukuba ingakanani impembelelo ye-BPA ingaba nayo kwi-fertility nempilo yabantu.
Ukuphepha i-BPA
Ezinye iziphumo ziye zafumanisa ukuba i-90% yabemi inamanqanaba afumanekayo e-BPA emcinini. Ukuqwalasela ukuba i-90% yabemi ayinakujongana nokungabikho kobuthathaka, ubungqina abubonakali kubonakalisa uxhulumano oluchanekileyo phakathi kwe-BPA kunye nokungabikho komntwana .
Nangona kunjalo, ngenxa yokuba ezinye izifundo zokuqala zifumene impembelelo kumanqanaba okuzala, mhlawumbi kungcono ukuphepha ii-BPA xa kunokwenzeka.
Ezinye iindlela unokunciphisa ukuhamba kwakho:
Nciphise inani lokutya okusemathinini oyisebenzisayo. Endaweni yoko, zama ukuthenga ukutya okuza kwimigodi yeglasi (okanye ukutya okutsha okanye okunqabileyo.)
Gwema ukupheka ukutya kwakho kwiipakethe zeplastiki, njengokuba ungakwenza xa ulwaphuza i-microwaving. Sebenzisa iglasi endaweni.
Gweba izikhuphelo zokutya eplastiki, iibhotile zamanzi kunye nezinye iibhotile zeplastiki ezinenani elingu-7. Ezi zinokuthi zibe neBPA. Musa ukusebenzisa kwakhona iibhotile zamanzi ezenzelwe ukulahlwa.
Thetha nodokotela wamazinyo ngokuzaliswa kwe-BPA-free.
Imithombo:
Goldman, Rose. Izingozi zomsebenzi kunye nokusingqongileyo ukuzaliswa kwamabhinqa. UpToDate.com.
Mok-Lin E, Ehrlich S, Williams PL, Petrozza J, Wright DL, Calafat AM, Ye X, Hauser R. Urinary Bhphenol Iimpawu kunye nokuphendula kwama-ovari kumabhinqa aphethwe yi-IVF. I-International Journal yeAndrology. Ngo-2010 kuMatshi; 33 (2): 385-93. Epub 2009 Nov 30.