Ilanga, elikude kakhulu futhi elikude kakhulu, lisekela ukulinganisela kokuphila eMhlabeni. Ilanga linika ukufudumala kweplanethi, ukushisa kanye namandla adingekayo we-photosynthesis. Iqhuba izingoma zethu zansuku zonke futhi zikhuthaza imizwa yokuphila kahle.
Ukukhanya kwelanga kubuye kubalulekile ekuqanjeni kwe- vitamin D esikhumbeni - yingakho i-vitamin D ngezinye izikhathi ibizwa ngokuthi i-vitamin ye-sun.
Futhi kwenzeka nje ukuthi izigidi zaseMelika zingase zingatholi ngokwanele i-vitamin D. Ungathola futhi i-vitamin D ekudleni kwakho, kodwa okumbalwa kakhulu kokudla okuvame ukusetshenziswa ekudleni kwe-Western kukhona imithombo emihle yemithombo yevithamini D.
Izingozi ze-UV Exposure
Izingozi ezivela ku-ultraviolet (UV) ziveziwe futhi zaxoxwa iminyaka. Ukukhanya kwe-UV kubangela basal cell carcinoma , squamous cell carcinoma , kanye ne-melanoma ebulalayo. Ingozi yesikhumba somdlavuza yesikhumba iyanda lapho abantu bexosha ngokweqile elangeni, noma bazibophe ngamabomu emithonjeni yokufakelwa kwemisebe ye-UV njengemibhede yokuqothula. Futhi kulabo abathintekayo ngemiphumela yezimonyo, ilanga liwumthombo walokho okwaziwa ngokuthi isithombe-ukuguga kusenesikhathi ngaphambi kwesikhumba ngenxa yokungabi khona kwe-UV okungapheli. Imiphumela ye-photoaging ibanga kusuka esikhwameni esicwebeziwe, esikhanyisiwe ukuze kube nokukhula okukhazimulayo, okwenziwe nge-scaly-crusty, noma i-actinic keratoses.
I-Melanoma Skin Cancer
Yize kungenjalo i-non-melanoma isikhumba somdlavuza sivame kakhulu, asivamile ukubulala. Ngokuphambene nalokho, i-melanoma imelela ngaphansi kwamaphesenti angama-5 azo zonke izifo zomdlavuza wesikhumba kodwa kubangelwa ukushona komdlavuza wesikhumba. Iwumdlavuza wesibili ovamile wesifazane eminyakeni yawo-20 kanye nomdlavuza wesithathu ovamile kakhulu wesilisa ema-20s. Ingozi enkulu ye-melanoma itholakale kulabo abanomlando wokungcola kwelanga lokukhula kwelanga.
I-sunscreen ivikela ukushiswa kwelanga, futhi i-sunscreen iyaqhubeka iphakanyiswa yi-American Academy of Dermatology. Ukuvikelwa ekushiseni okukhulu kuyinto enhle, futhi kubonakala sengathi lokhu kungase futhi kuhumushe ekuvikelweni okuthile uma kuziwa ekubulaleni. Lokho kusho ukuthi, i-sunscreen ingenye ingxenye yesithombe sonke uma kuziwa ekuvikelweni elangeni. Futhi akukho zifundo eziye zabonisa ukuthi ukusetshenziswa kwelanga, okuwukuphela, kuvimbela i-melanomas noma i-basal cell carcinomas, ngokusho kwesigatshana esashicilelwe ngo-March 20011 kulo magazini, "I-Pediatrics." Isikhathi esichithwa elangeni nokugqama kwakho nazo izici ezibalulekile.
Ingabe I-Vitamin Yelanga Ivikela I-Cancer?
Kunesizathu sokuba nethemba, kodwa kuneminye imibuzo eminingi ehlala ingaphenduliwe. Ngokusho kocwaningo lwama-laboratory, ukungaboni kahle kwe- vitamin D kubonakala sengathi kusiza ezinye izinyathelo ezimbi zokuthuthukisa, kodwa ochwepheshe bathi ucwaningo olwengeziwe luyadingeka ngaphambi kokuba kusetshenziswe isimiso esiningi sokutholakala kwe- vitamin D yokuvimbela umdlavuza.
I-"Low Cloud Cover" Study and Leukemia
Ucwaningo lwezilwane kanye nelabhoratri lusekela umbono wokuthi ukuba namavithamini D ananele angasiza ekuvimbeleni i-leukemia, kodwa akukho bufakazi obunjalo kubantu. Kodwa-ke, iqembu labososayensi lazibuza ukuthi ngabe lingabona yini umphumela wokuzivikela ekukhanyeni kwelanga (namazinga aphezulu kavithamini D) asekelwe emazweni ahlukahlukene.
Bahlongoza ukuthi abantu abahlala emazweni badlule kude ne-equator, kanti ukukhanya okuncane kwe-UVB, okuvame ukuba namazinga aphansi kavithamini D, kungabonisa ingozi ephezulu yamanyevuza, kuhlanganise ne- leukemia .
Ngokungafani nezifundo zangaphambilini, leli qembu lilungiselele ikhava yefu emazweni ahlukahlukene futhi lithinta ukuvezwa kwe-UVB yabantu abaphila ngezansi. Benze lezi zinguquko ngokusebenzisa idatha ye-satellite evela ku-NASA.
Kulesi sifundo, ukuguqula i-cover yefu, amazinga e-leukemia ayephakeme kakhulu emazweni asondelene kakhulu nezibonda, njenge-Australia, i-New Zealand, i-Chile, i-Ireland, i-Canada ne-United States.
Babephansi kakhulu emazweni aseduze ne-equator, njengeBolivia, iSamoa, iMadagascar neNigeria.
Lolu hlobo lokutadisha alukwazi ukufakazela ukuthi ukutholakala kwe-vitamin D kuholela ekubulaleni i-leukemia, kodwa kubonisa inhlangano engasakaza futhi ihlaziywe ososayensi.
Ukwelashwa kwe-Vitamin D ne-Leukemia
Endabeni yamagciwane egazi afana ne-leukemia ne-lymphoma, ubufakazi busekela umqondo wokuthi i-vitamin D empeleni ibonakala iyasiza ezinye izindlela zokwelapha umdlavuza zenza umsebenzi wazo.
Izifundo zibonise ukuxhumana phakathi kokuntuleka kwe-vitamin D nokuhlaselwa okubi kakhulu ezinhlobonhlobo ezihlukahlukene zesifo somdlavuza wegazi, kuhlanganise ne-lymphocytic leukemia (CLL) engavamile , futhi ihlukanisa i-B cell lymphoma (DLBCL) enkulu, uhlobo oluvame kakhulu lwe- non-Hodgkin lymphoma .
Kodwa lezi zifundo zibuka emuva, ngakho-ke kungaba nzima ukutshela imbangela kusukela ekusebenzeni. Kungenzeka yini ukuthi i-vitamin D isetshenziselwe ukwandisa amandla emithi ethile yomdlavuza? Lokhu kuhlala umbuzo ovulekile, kodwa idatha iyakhuthaza.
Indima yendabuko ka vithamini D yamathambo aqinile nawo afanelekile. Eziningi zokwelapha umdlavuza - futhi kaningi amakhemikhali ngokwabo - anokuthambekela ekunciphiseni ama-bone mass, okwandisa ingozi ye-osteoporosis. Ngakho ukugcina amazinga awanele we-calcium ne-vitamin D kungabalulekile futhi ngokubheka impilo yethambo.
Imithombo:
> I-American Academy of Dermatology. I-Sunscreen ihlala ifomu elivikelekile, eliphumelelayo lokuvikelwa kwelanga.
I-Balk SJ. I-Ultraviolet Radiation: Ingozi Kubantwana Nezingane Ezitholakalayo. Izingane zokwelapha . 2011; 127 (3): 588-97.
> Cuomo RE, Garland CF, Gorham ED, Mohr SB. I-Lowradio ye-Ultraviolet B i-Irradiance e-Low-Fi ehambisana ne-High Incidence Amanani we-leukemia: Ukufundwa kwamazwe angu-172. PLoS ONE . 2015; 10 (12): e0144308.
> Ukuphathwa kweNational Aeronautics and Space. I-International Satellite Cloud Climatology Project Database. http://isccp.giss.nasa.gov/products/browsed2.html.
> Wu X, Groves FD, McLaughlin CC, Jemal A, Martin J, Chen VS. Imikhuba Yokwenzeka Emdlalweni Wezinsana Ezinganeni Nezingane Ezincane E-United States. I-Caus Causes Control. 2005; 16 (3): 309-320.