Umhlahlandlela Wansuku zonke Wokhuseleko Lelanga: Kungani i-SPF Ingumgaqo Ongaguqukiyo

Umgama we-ultraviolet ophuma elangeni ufika emhlabeni ngeendlela ezimbini ezithintela isikhumba sakho ngendlela ehlukile, kwaye ukuqonda le meko kubalulekile ekukhetheni ukhuseleko olufanelekileyo. Iimitha ze-UVB ziimitha ezimfutshane ezibangelwa ukushisa kwelanga — ubomvu, ubuhlungu, kunye nokuphuma kwe-epidermis obujolise kumphosa emva kokuchaphazeleka okungavumelekanga kokukhanya kwelanga. Ubukhulu be-UVB buhluka ngexesha leminyaka, ixesha losuku, kunye neendawo, bujolise kakhulu ngexesha lehlobo kunye nezihlandlo zexesha lasemidlalweni.

Le mitha ifikelela kwi-layer yokugqibela yesikhumba kwaye ibangela umonakalo ngqo kwi-DNA kwiicell zesikhumba, yenza ukuba ibe ngumgca ophambili we-skin cancer. Iimitha ze-UVA, ezibandakanya malunga ne-95 percent ye-ultraviolet radiation efika emhlabeni, zine-wavelength ende kwaye zifikelela kakhulu kwi-skin, zifikelela kwi-dermis apho i-collagen kunye ne-elastin fibers zihlala khona. I-UVA ngumgama wokuguga — iyaphula i-collagen, ikhiqiza i-free radicals, iqhubele phambili utshintsho lwepigmentation, kwaye ibangela i-wrinkles, ukwehla, kunye nomphunga onjengompu.

Ngokungafani ne-UVB, ubukhulu be-UVA buhlala buphakathi kokuhlala konyaka nasemini. Iphinda ifike kwiifolokhwe kunye neengcango, yiyo le nto ungaphosa umonakalo welanga ngexesha lokuhamba okanye uhleli eduze kwefines. Bobabini ubume be-UV radiation bunceda kwi-skin cancer, kodwa imiphumo yabo iyahluka.

Umonakalo we-UVB ubonakala ngokukhawuleza kwaye ubonakalayo — uyazi xa ube ushaywe. Umonakalo we-UVA ungumnyama kwaye uyakhula, uqokelela phezu kweminyaka ngaphandle kokubonisa iimpawu ezicacileyo de kube nemiphumo ibonakala njenge-premature aging okanye i-lesion enokubangela ukukhathazeka. Le nto yenza ukuba abahlola isikhumba baphakamise ukhuseleko lwe-broad-spectrum olukhusela ngokuchanekileyo kwiimitha ze-UVA kunye ne-UVB, hayi enye kuphela.

Iisunscreens zihlala zihlukaniswe kwiindidi ezimbini ezisisiseko ngokusekelwe kwiingxube zazo ezisebenzayo, kwaye impikiswano phakathi kwazo ikhokelela kwiingcinga ezomeleleyo. Iisunscreens zeekhemikhali (ezisebenzayo) ziquka iikhemikhali ezifana ne-avobenzone, homosalate, octisalate, kunye ne-octocrylene ezithatha i-UV radiation kwaye ziguqule ibe yishushu, eyakhululwa emzimbeni. Iisunscreens zeekhemikhali zihlala zihlala zikhangela kakuhle — ziqhuba kalula, zithathwa zingabonakali, kwaye zisebenza kakuhle phantsi kwemveliso yokwenza, okwenza kube lula ukuzisebenzisa rhoqo.!!

Nangona kunjalo, ezinye iifilitha zeekhemikhali, ngakumbi i-oxybenzone, zikhokelele kwiingxaki malunga nokuphazamiseka kwe-endocrine kunye nomphumela wokusingqongileyo kwiikhorali, oku kuholele kwiimfuno zokungavunyelwa kwiindawo ezithile zolwandle. Iisunscreens zeeminerali (ezingekho khemikhali) zisebenzisa i-zinc oxide kunye ne-titanium dioxide, ezihlala phezulu kwindawo yesikhumba kwaye ziqhuba kwaye zihlala zikhangela i-UV radiation. Iisunscreens zeeminerali zihlala zifumaneka kakuhle kwi-skin eshushu kunye ne-reactive kuba azidingi ukuthathwa kwaye zineengozi eziphantsi zokubangela ukungonwabi okanye i-allergic contact dermatitis.

I-zinc oxide ibaluleke kakhulu kuba ibonelela ngovavanyo olukhulu lwe-broad-spectrum kwiindawo ze-UVA kunye ne-UVB kwiingxube ezisodwa. Ityala elidala malunga neesunscreens zeeminerali — i-cast emhlophe enzima — ikhokhelwe kakhulu ngama-micronized kunye neefomulations ezinombala, nangona abanye abantu abanemibala emnyama bangakha babone i-cast. Impendulo enyanisweni yokuba yiphi uhlobo olungcono kukuba yiphi uhlobo oza kulusebenzisa yonke imihla.

Iisunscreens zeekhemikhali ezikhangayo zihlala zikhupha ukhuseleko olungakumbi kuneesunscreens zeeminerali ezihlala zingasetyenziswanga kuba ungayithandi i-texure yayo. Iimveliso ezininzi zanamhlanje zidityaniswe neefilitha zeekhemikhali kunye nezeeminerali ukuze zifumane ukhuseleko olungcono kunye nokugqoka.

I-SPF, okanye i-Sun Protection Factor, yenye yeemetrics ezingaqondakaliyo kakhulu kwi-skincare. I-SPF ikala ukhuseleko ngokuchasene ne-UVB rays ngokukodwa — iiray eziyimbangela yokutshisa ilanga. I-SPF ye-30 ithetha ukuba, xa ifakwe ngokuchanekileyo, kuthatha i-30 times ixesha elide ukuze i-UVB rays ibomvu isikhumba sakho xa kuthelekiswa nokungafakwanga nokukhusela.

Nangona kunjalo, oku akuhambelani ngokuthe ngqo nokwandiswa kokhuseleko. I-SPF ye-15 ifaka malunga ne-93 percent ye-UVB rays, i-SPF ye-30 ifaka malunga ne-97 percent, kwaye i-SPF ye-50 ifaka malunga ne-98 percent. Ukuphosa ukusuka kwi-SPF ye-30 ukuya kwi-SPF ye-50 kunika kuphela i-percent enye yokufaka i-UVB, yiyo loo nto oodermatologists bacinga ukuba i-SPF ye-30 iyimfuneko yokwenene endaweni yokuphosa iinombolo eziphezulu.!!

Akukho sunscreen iblock 100 percent ye-UV radiation. I-SPF ratings ikwanqwenela ubungakanani obuthile bokufaka — i-2 milligrams per square centimeter — okungaphezulu kakhulu kunokuba abantu abaninzi baphosa ngempela. Istudies zihlala zikhombisa ukuba umntu ophakathi kokuphosa kuphela i-25 ukuya kwi-50 percent ye-amount eyalelwe, ukunciphisa i-SPF ye-50 kumphosa i-SPF ye-12 ukuya kwi-25 kumsebenzi.

Le ngxaki yokungafaki kakuhle ibaluleke kakhulu kunokwahluka phakathi kwe-SPF ye-30 kunye ne-SPF ye-50. Okungafakwanga kwe-SPF akukali ukhuseleko lwe-UVA. E-Europe, uphawu lwe-UVA circle okanye i-PA rating system (PA+ ukuya kwi-PA++++) ibonisa umgangatho wokukhusela i-UVA.

E-United States, igama elithi broad-spectrum lithetha ukuba umkhiqizo unika ukhuseleko lwe-UVA, nangona umgangatho ungachazwanga. Ukuze ufumane ukhuseleko olupheleleyo, hlala ukhetha umkhiqizo we-broad-spectrum kwaye uwufake ngokwaneleyo — ngakumbi kukuhle xa kuziwa kumlinganiso we-sunscreen.

Ukufaka ngokuchanekileyo yindawo apho abantu abaninzi behluleka kwi-sunscreen, kwaye ukufaka okungafanelekanga kufana nokungafaki i-sunscreen nhlobo. Kwimeko ye-face kuphela, oodermatologists bacebisa malunga nomlinganiso we-nickel, okanye malunga ne-kwarta ye-teaspoon. Kwimilo yonke emzimbeni kwi-scenario ye-swimsuit, kufuneka malunga ne-ounce, egcwalisa iglasi ye-shot ejolise.

Ukuba awusebenzisi le mlinganiselo, awufumani ukhuseleko olukhankanywe kwi-label. Indlela efanelekileyo ye-face yindlela ye-two-finger: cindezela umgca we-sunscreen ubude be-index kunye ne-middle fingers, kwaye le mlinganiselo ikhululekile ngokwaneleyo kwi-face kunye ne-neck. Faka i-sunscreen kwi-skin eyomileyo okungenani imizuzu eyi-15 ngaphambi kokuba ubone ilanga ukuze uvumele iifilitha zeekhemikhali zixhume kwisikhumba.

Iisunscreens zeeminerali zisebenza ngokukhawuleza xa zifakwa kuba zihlala phezulu. Ukuphinda ufake yindawo apho ukhuseleko ngempela kuphila okanye kufe. I-sunscreen kufuneka iphinde ifakwe rhoqo kwiiyure ezimbini ngexesha lokuphila elide elangeni, kwaye ngokukhawuleza emva kokubhukuda, ukujolisa kakhulu, okanye ukomisa, kungakhathaliseki ukuba umkhiqizo uthi unokumelana namanzi.!!

I-sunscreen emelana namanzi igcina i-SPF yayo ebhalwe kwi-label kwiiyure ezili-40 okanye ezili-80 zomsebenzi wamanzi, emva koko kufuneka iphinde ifakwe. Kubantu abasebenza kwi-ofisi okanye ngaphakathi, ukufaka okukhulu kwe-morning okukodwa ngokubanzi kukhulu ukuba awuchitha ixesha elide ngaphandle. Nangona kunjalo, ukuba udlula ngaphakathi kwelanga ngexesha lokuhamba okanye iintsuku zokuphumla, ukuphinda ufake ngexesha lemidlaliso kunika ukhuseleko olungcono. I-makeup enez-SPF kunye ne-sprays zokumisa zingasetyenziswa kodwa akufanele zikhuphe umkhiqizo we-sunscreen ophosakeleyo, njengoko zifakwe kakhulu kancinci kwaye zingalingani ukuze zibe nokhuseleko oluthembekileyo zodwa.

Ubulumko malunga ne-sunscreen buhlala bukhona nangona kudlule iminyaka emininzi, kwaye ezi ngcamango zihlala zikhathaza abantu ngokuphosa ukungasetyenziswa rhoqo. Ingcamango: Awudingi i-sunscreen kwiimvula. I-Reality: ukuya kwi-80 percent ye-UV radiation ingena kwi-umbala, oku kuthetha ukuba iindawo ezimnyama zikhupha ukhuseleko oluncinci.

Ingcamango: Isikhumba esimnyama asidingi i-sunscreen. I-Reality: nangona umxholo ophezulu we-melanin unika ukhuseleko lwe-UV oluthile olufana ne-SPF ye-10 ukuya kwi-13, oku kuphantsi kakhulu kumlinganiselo ophakanyisiweyo. Abantu abanemibala emnyama bahlala bephumelela i-haut cancer, kwaye xa benza, ikakhulu ibonwa kamva kwaye kwiimeko ezinzima.

Ingcamango: I-sunscreen ibangela ukungabikho kwe-vitamin D. I-Reality: i-studies zikhombisa ukuba ukusebenzisa i-sunscreen rhoqo akunciphisi kakhulu i-levels ye-vitamin D, njengoko ukuchaphazela okungafanelekanga kunye nemithombo yokutya ngokubanzi kugcina i-levels ezaneleyo. Imizuzu embalwa yokuchaphazela ilanga ezandleni nasezithendeni iyanelisa ukuveliswa kwe-vitamin D kubantu abaninzi.

Ingcamango: I-sunscreen iyingozi. I-Reality: uphando olukhankanyiweyo olukhombisa ukufakwa kweekhemikhali kwi-bloodstream lusebenzisa i-amount ye-application ephindwe kane ngaphezu kokusetyenziswa okujolise, kwaye ukufakwa akuhambelani nokulimala. Iiarhente ezilawulayo emhlabeni jikelele ziqhubeka ziqinisekisa ukhuseleko lwezithako ze-sunscreen ezivunyelweyo.

Ingcamango: I-base tan ikhusela ekutshiseni ilanga. I-Reality: i-tan ibonelela malunga ne-SPF ye-3 ukuya kwi-4 yokukhusela, eyincinane, kwaye i-tan uqobo ibonisa ubungqina bokulimala kwe-DNA obuphakamisa umngcipheko we-cancer. Ingcamango: Ufuneka i-sunscreen kuphela ngexesha lehlobo.

I-Reality: I-UVA radiation, ebangela ukuguga kwaye ibangela i-cancer, ikhona unyaka wonke kwaye ingena kwi-glass. Ukufaka i-sunscreen yonke imihla, kungakhathaliseki ixesha, yindlela eyona ilungileyo yokuthintela umngcipheko we-haut cancer kunye nokugcina isikhumba esincinci, esinombala ophakathi kokuphila.