Kungase kubonakale kungavamile ukugcizelela ukubaluleka kwe-vitamin D uma kuyihlobo, kepha iningi lethu lizoqhubeka lidinga ukwesekwa naphezu kokushisa kwelanga. Uma amazinga akho ephansi, iholide elilodwa noma amabili eholidini mhlawumbe ngeke liwanele ukugcwalisa le vithamini ukuze kufike ngokwanele. Futhi, uma usebenza endlini noma ugqoka isikrini selanga lapho uphuma ngaphandle (futhi kukuhle uma wenza), kufanele uhlanganise ne-vitamin D.
Ngaphandle kwemiphumela yayo emihle ekuncelweni kwethambo ne-calcium, i-vitamin D inikeza ukuvikelwa komdlavuza onamandla. Okunye okutholakala kunomhlabathi owedlula zonke emdlalweni wesayensi eminyakeni yamuva kube ubufakazi bokuthi amandla e-vitamin D avikela ukulwa nomdlavuza. Amaphepha angaphezu kuka-800 wesayensi ashicilelwe ebuhlotsheni obuphakathi kuka-vitamin D kanye namanqamu. Manje sinobufakazi obuningi bokulondoloza amazinga awanele e-vitamin D yindlela ephumelelayo yokuvikela umdlavuza. Ucwaningo lubonisa ukuthi u-vitamin D ngokwanele kunciphisa ingozi yokufa emangeni, emilenzeni, emaphashini nasesifo somdlavuza, i-leukemia kanye ne-lymphomas nawo wonke amakhemikhali ahlangene. Ukuhlaziywa kuka-2014 ku-vitamin D ukwesekwa kwatholakala ukuthi kuhlotshaniswa nengozi encane yokubulawa komdlavuza.
Ubufakazi be-Vitamin D's ikhono lokunciphisa ingozi yomdlavuza
Umqondo wokuthi i-vitamin D ingazivikela ngokumelene namagciwane avela ekubonweni ukuthi ukufa komdlavuza wekoloni kwakuphakeme kakhulu ezindaweni ezazingenakukhanya kwelanga.
Ucwaningo oluthile luthole ukuhlobana okuphambene phakathi kokukhanya kwelanga kanye nezinhlobo ezingu-24 zomdlavuza, kuhlanganise nezinye zebele, i-colon, rectum, ne-prostate. Ngenxa yokuthi umthombo we-vitamin D oyinhloko wabantu abaningi, futhi isikhumba esimnyama asikwazi ukusebenza kahle ekukhiqizeni i-vitamin ekuphenduleni imisebe ye-UV, ukungabi namandla kwe-vitamin D kucatshangwa ukuthi yisinye isizathu sokungafani komdlavuza okukhona phakathi kwama-Afrika aseMelika namaMelika aseMelika.
Ubufakazi obukhomba ukubandakanyeka kwe-vitamin D's ekunciphiseni ingozi yomdlavuza kuye kwanda. Ukwesekwa okuqhubekayo kokubaluleka kwe-vitamin D's ekuvimbeleni umdlavuza kwanikezwa izilingo ezilawulwa ngokungahleliwe ze-vitamin D eyengeziwe eyabonisa ingozi yemdlavuza uma kuqhathaniswa ne-placebo. Kubuye kube nemibiko eminingi ukuthi izakhi zofuzo ze-vitamin D, eziphazamisa izenzo ezivamile ze-vitamin D, zihlobene nomngcipheko womdlavuza owandayo.
Ucwaningo olwengeziwe luqinisekisile ukuthi i-vithamini D ingavimbela ukukhula kwegciwane lomdlavuza ngezindlela eziningi: I-Vitamin D iyashintsha inkulumo yezakhi zofuzo ezilawula ukuvuvukala, ukufa kweseli kanye nokwanda kweseli, futhi kuphazamisa izenzo zokukhuthaza ukukhula kwe-IGF-1 nezinye izici zokukhula. Ibuye ivuselele ukulungiswa kwe-DNA nokuzivikela ngegciwane, kanye ne-angiogenesis inhibition.
I-Vitamin D nokuguga okunempilo
Ukwengeza ekuvimbeleni umdlavuza, ukuqinisekisa ukuthi amazinga e-vitamin D anele angasiza ukunciphisa ubungozi bokukhubazeka nokuwa. Amapulazi angabhubhisa abantu asebekhulile, imbangela enkulu yezinhlanzi, ukulimala kwekhanda, kanye nokufa ngengozi kubantu abadala. Ngemuva kokuwa, kuvamile ukuthi umuntu osekhulile akwazi ukwehla okusheshayo emsebenzini womzimba nokulahlekelwa ukuzimela.
Cishe amaphesenti angama-25 aseMelika asebekhulile awela phakathi kwezinyanga eziyisithupha, futhi abangaphezu kwamaphesenti angama-50 bayiswa ekhaya elikhulelwe.
Ukulahlekelwa kwe-muscle mass kanye nokuntuleka kwe-vitamin D yizici ezimbili zobungozi bokuwa, futhi lezi zici zixhunyiwe. Elinye lama-vitamin D's ezincane ezisezindaweni eziyaziwa yiyona nethonya elizuzayo ekusebenzeni kwemisipha, ngokushintsha ukukhuluma kwegenesis nokuthutha kwe-calcium kumaseli omzimba. I-vitamin D ephansi ihlotshaniswa namandla anesisindo esinciphile kubantu asebekhulile, futhi ukutholakala kwe-vitamin D kuye kwatholakala ukuthuthukisa amandla nesisindo.
Ukunquma inani elifanele lamavithamini D
Amazinga aphansi angaphansi kwe-vitamin D atholakale ejwayelekile kakhulu e-United States naseCanada.
Ukudla okuncane kakhulu ngokweqile kuqukethe i-vitamin D nokufinyelela amazinga afanele ngelanga elingaba nzima, kuye ngokuthi uhlalaphi, isikhathi esichitha ngaphandle, nombala wesikhumba sakho. Ukushiswa kwelanga ngaphezulu kubangela ingozi yomonakalo wesikhumba kanye nengozi yomdlavuza wesikhumba.
Umthamo wansuku zonke owenziwe nge-vitamin D3 supplement (okuyindlela yemvelo ye-vithamini futhi iyisisindo esiphephile esiphezulu kune-vitamin D2), kuyindlela enengqondo kubantu abaningi. Njengoba kuphakanyiswe ubufakazi besayensi, ihlose izinga legazi elingama-30 kuya ku-45 ng / ml. Kubantu abaningi, lokhu kuzosho ukufakazela nge-1000 kuya ku-2000 IUs of vitamin D nsuku zonke.
> Imithombo:
> Bjelakovic G, Gluud LL, Nikolova D, et al: Vitamin D ukwesekwa kokuvimbela ukufa kubantu abadala. I-Cochrane Database Syst Rev 2014; 1: CD007470.
> Moukayed M, Grant WB: Isixhumanisi se-molecular phakathi kuka-vitamin D nokuvimbela umdlavuza. Ama-nutrients 2013; 5: 3993-4021.
> Sempos CT, uDurazo-Arvizu RA, Dawson-Hughes B, et al. Ingabe kukhona ubudlelwane obufana noJ obuphakathi kuka-25-hydroxyvitamin D kanye nokufa kwezinto zonke? Imiphumela evela e-United States emele iNANANES emele izwe. J Clin Endocrinol Metab 2013, 98: 3001-3009.
> Bischoff-Ferrari HA. I-Vitamin D nokuvimbela ukuphulwa. I-Rheum Dis Clin North Am 2012, 38: 107-113.
> I-Halfon M, i-Phan O, i-Teta D. I-Vitamin D: ukubuyekezwa emiphumeleni yayo emandleni emisipha, ingozi yokuwa, kanye nokukhubazeka. I-Resom Res Int 2015, 2015: 953241.