Umhlahlandlela Wansuku zonke Wokusebenzisa I-Sunscreen: Kungani i-SPF Ingashintshi

Ukwelashwa kwe-ultraviolet okuvela elangeni kufika emhlabeni ngezindlela ezimbili ezithinta i-skin yakho ngendlela ehlukile, futhi ukuqonda umehluko kubalulekile ekukhetheni ukuvikelwa okufanele. Imisebe ye-UVB iyimisebe emifushane ethinta ukuvuvukala kwelanga — ububomvu, phezulu, nokuphuka okuthola emva kokuthola ilanga elingavikelwanga kakhulu. Ubukhulu be-UVB buhlukahluka ngenyanga, isikhathi sosuku, kanye nezindawo, buhamba phezulu phakathi nezinyanga zonyaka nezikhathi zaphakathi nosuku.

Le misebe ingena ngaphakathi kwengqimba yangaphandle ye-skin futhi ibangela ukulimala okuqondile kwi-DNA kumaseli e-skin, okwenza kube umgibeli ophambili we-skin cancer. Imisebe ye-UVA, ethatha cishe amaphesenti angama-95 we-ultraviolet radiation efika emhlabeni, inobude obude futhi ingena kakhulu ngaphakathi kwengqimba ye-skin, ifika ku-dermis lapho ama-collagen nama-elastin fibers ekhona. I-UVA iyimisebe yokuguga — iyaphula i-collagen, ikhiqiza ama-free radicals, ibangela izinguquko ze-pigmentation, futhi ifaka isandla ekwakheni ama-wrinkles, ukuwa, kanye ne-texture efana ne-leather.

Ngokwehlukile ku-UVB, ubukhulu be-UVA buhlala bujwayelekile unyaka wonke nasemini. Futhi ingena ngaphezu kwamafu ngethusi lewindi, okwenza ukwazi ukuthola ukulimala kwelanga ngenkathi uhamba noma uhlezi eduze kwewindi. Bobabili ubuchwepheshe be-UV buhlanganyela ekwakheni i-skin cancer, kodwa imiphumela yabo iyahluka.

Ukulimala kwe-UVB kuvame ukuba kubukhali futhi kubonakala — uyazi uma usubukhali. Ukulimala kwe-UVA kuyathula futhi kuqoqeka, kukhula eminyakeni ngaphandle kwezimpawu ezibonakalayo kuze kube imiphumela ibonakala njenge-premature aging noma i-lesion ephawulekayo. Lokhu kungani odokotela bezokwelapha bephakamisa ukuvikelwa okubanzi okuvikela kokubili imisebe ye-UVA ne-UVB, hhayi eyodwa kuphela.

Ama-sunscreens ahlukaniswe ngezigaba ezimbili eziyisisekelo ngokusekelwe ezithako zabo ezisebenzayo, futhi impikiswano phakathi kwazo ikhiqiza imibono eqinile. Ama-sunscreens e-chemical (organic) aqukethe izixazululo ezifana ne-avobenzone, homosalate, octisalate, kanye ne-octocrylene ezithatha i-UV radiation futhi ziguqule ibe ukushisa, okukhishwa emzimbeni. Ama-sunscreens e-chemical avame ukuba nekhwalithi yokubukeka — akhanya kalula, athatheka ngokungabonakali, futhi ahlukaniswe kahle ngaphansi kwe-makeup, okwenza kube lula ukuwasebenzisa njalo.!!

Nokho, ezinye izihlungi ze-chemical, ikakhulukazi i-oxybenzone, zikhuphule ukukhathazeka mayelana nokuphazamiseka kwe-endocrine kanye nomthelela wemvelo kumagagasi e-coral, okuholele ekwenzeni imithetho ethile ezindaweni zasolwandle. Ama-sunscreens e-mineral (inorganic) asebenzisa i-zinc oxide ne-titanium dioxide, ezihlala phezulu kwengqimba ye-skin futhi zihlukanise futhi zikhombise i-UV radiation. Ama-sunscreens e-mineral avame ukwamukelwa kahle ngama-skin abucayi futhi aphendulayo ngoba awadingi ukuthathwa futhi anomthelela ophansi wokubangela ukuvuvukala noma i-allergic contact dermatitis.

I-zinc oxide ibalulekile ngoba inikeza ukuvikelwa okuhle okubanzi kokubili kumisebe ye-UVA ne-UVB ngesisekelo esisodwa. Ukukhala kwhistorical mayelana nama-sunscreens e-mineral — i-cast emhlophe esindayo — sekuqinisekiswe kakhulu ngama-formulations amanje e-micronized kanye ne-tinted, nakuba abanye abantu abanemibala emnyama bangathola i-cast ibonakala. Impendulo eqotho yokuthi iyiphi uhlobo olungcono yileyo ozoyisebenzisa nsuku zonke.

I-sunscreen ye-chemical enhle efakwe njalo inikeza ukuvikelwa okuningi kakhulu kune-sunscreen ye-mineral engahlali isetshenziswa ngoba ungayithandi i-texture yayo. Imikhiqizo eminingi yanamuhla ihlanganisa izihlungi ze-chemical ne-mineral ukuze kuzuze ukuvikelwa okuhle nokugqokwa.

I-SPF, noma i-Sun Protection Factor, ingenye yezilinganiso ezivame ukungaqondiwe emkhakheni wezokunakekelwa kwesikhumba. I-SPF ikala ukuvikelwa ngokumelene nemisebe ye-UVB ikakhulukazi — imisebe ebangela ukuvuvukala kwelanga. I-SPF engu-30 ibonisa ukuthi, uma ifakwe kahle, kuthatha izikhathi eziyi-30 eziningi ukuze imisebe ye-UVB ibangele ukuvuvukala kwesikhumba sakho uma kuqhathaniswa nokungabi nokuvikelwa.

Nokho, lokhu akuhumushi kahle ekwandeni kokuvikelwa. I-SPF 15 ihlunga cishe amaphesenti angama-93 emisebeni ye-UVB, i-SPF 30 ihlunga cishe amaphesenti angama-97, kanti i-SPF 50 ihlunga cishe amaphesenti angama-98. Ukukhuphuka kusuka ku-SPF 30 kuya ku-SPF 50 kunikeza kuphela iphesenti elilodwa elengeziwe lokuhlunga i-UVB, okwenza odokotela bezokwelapha bacabange ukuthi i-SPF 30 iyinani elincane elisebenzayo kunokuphakamisa izibalo eziphakeme.!!

Akukho sunscreen evikela amaphesenti angama-100 we-UV radiation. Izilinganiso ze-SPF zicabanga ngosayizi othile wokufaka — ama-milligrams amabili nge-sentimeter eyodwa — okungaphezu kwalokho okukhona abantu abaningi abakufaka. Izifundo zikhombisa njalo ukuthi umuntu ojwayelekile ufaka kuphela amaphesenti angama-25 kuya kwangama-50 enani elincomekayo, okunciphisa umkhiqizo we-SPF 50 ube ngu-SPF 12 kuya ku-25 empeleni.

Le nkinga yokungafaki kahle ibaluleke kakhulu kunokwehluka phakathi kwe-SPF 30 ne-SPF 50. Lokhu i-SPF ayikala ukuvikelwa kwe-UVA. E-Europe, uphawu lwe-UVA circle noma uhlelo lokuhlola lwe-PA (PA+ kuya ku-PA++++) lukhombisa izinga lokuvikelwa kwe-UVA.

E-United States, igama elithi broad-spectrum lisho ukuthi umkhiqizo unikeza ukuvikelwa kwe-UVA, nakuba izinga lingachaziwe. Ukuze uthole ukuvikelwa okuphelele, njalo khetha umkhiqizo obanzi futhi uwufake ngokweqile — okungaphezulu kuyiqiniso kungcono uma kuziwa enanini le-sunscreen.

Ukufaka kahle kuyindawo lapho abantu abaningi behluleka khona nge-sunscreen, futhi ukufaka okunganele kulingana ngokusebenza nokungafaki i-sunscreen nhlobo. Ngaphezulu kobuso kuphela, odokotela bezokwelapha baphakamisa cishe inani elilingana ne-nickel, noma cishe ingxenye yesine ye-teaspoon. Ukuze uqedele umzimba wonke uma ugqoke i-swimsuit, udinga cishe i-ounce eyodwa, egcwalisa ingilazi ejwayelekile yokuphuza.

Uma ungasebenzisi lokhu okuningi, awutholi ukuvikelwa okukhulunywa ngakho etiketini. Indlela esebenzayo yokufaka ebusweni iyinqubo yezinhlamvu ezimbili: cindezela umugqa we-sunscreen ubude bezinhlamvu zakho zokuqala nezaphakathi, futhi le mali ilingana kahle kakhulu nobuso nentamo. Faka i-sunscreen esikhumbeni esomile okungenani emizuzwini eyi-15 ngaphambi kokuthi ubhekane nelanga ukuze uvumele amafutha kemikhakha axhume nesikhumba.

Ama-sunscreens emineral asebenza ngokushesha lapho efakwa njengoba ehlala phezulu. Ukufaka kabusha yindawo lapho ukuvikelwa kuhlala khona noma kufe. I-sunscreen kufanele ifakwe kabusha njalo emizuzwini emibili ngesikhathi sokubhekana nelanga okuqhubekayo, futhi ngokushesha ngemva kokubhukuda, ukuvuvukala kakhulu, noma ukoma, kungakhathaliseki ukuthi umkhiqizo uthi uyawuvikela emanzini.!!

I-sunscreen evikela emanzini igcina i-SPF yayo ebhalwe phansi isikhathi esingama-40 noma ama-80 imizuzu yokusebenza emanzini, emva kwalokho kufanele ifakwe kabusha. Kubasebenzi bezinsuku zonke ehhovisi noma ngaphakathi, ukufaka okwakhe okukhulu ekuseni kuvame ukuba kuhle uma ungachithi isikhathi eside ngaphandle. Nokho, uma udlula ngaphansi kokukhanya kwelanga ngenkathi uhamba noma uphuzisa, ukufaka kabusha phakathi kosuku kuveza ukuvikelwa okungcono kakhulu. I-makeup equkethe i-SPF kanye nezinsipho zokumisa zingasiza kodwa akufanele zishintshe umkhiqizo we-sunscreen ohlosiwe, njengoba zifakwa kancane kakhulu futhi ngokungafani ukuze zinikeze ukuvikelwa okuthembekile zodwa.

Ukwazi okungelona iqiniso mayelana ne-sunscreen kuqhubeka nokukhona naphezu kweminyaka eminingi yobufakazi, futhi lezi zinganekwane zihlupha abantu ngokuphikisa ukusetshenziswa okuqhubekayo. Izinganekwane: Awudingi i-sunscreen ezinsukwini ezinamafu. Iqiniso: kuze kube ngu-80% we-UV radiation ungene ngaphansi kwemafu, okusho ukuthi izinsuku ezinamafu zinikeza ukuvikelwa okuncane.

Izinganekwane: Isikhumba esimnyama asidingi i-sunscreen. Iqiniso: nakuba okuqukethwe kwe-melanin okuphezulu kunikeza ukuvikelwa kwe-UV okungokwemvelo okulingana cishe ne-SPF 10 kuya ku-13, lokhu kuphansi kakhulu kunokuncane okukhulunywa ngakho. Abantu abanemibala yesikhumba emnyama basathola umdlavuza wesikhumba, futhi uma benza, kuvame ukuhlinzekwa ngemuva kokuhlolwa okungaphambili futhi ezingeni eliphezulu.

Izinganekwane: I-sunscreen ibangela ukuntuleka kwe-vitamin D. Iqiniso: ucwaningo lukhombisa ukuthi ukusetshenziswa kwe-sunscreen okujwayelekile akunciphisi kakhulu amazinga e-vitamin D, njengoba ukuvezwa okungafanele nezinsiza zokudla kuvame ukugcina amazinga afanele. Imizuzu embalwa yokukhanya kwelanga ezandleni nasezithweni zokusiza iyanele ukuze kuqhamuke i-vitamin D kubantu abaningi.

Izinganekwane: I-sunscreen iyingozi. Iqiniso: ucwaningo oluvame ukucaphuna olukhombisa ukufakwa kwefutha le-chemical emathunjini lusebenzisa izinga lokufaka eliphezulu kakhulu kunezinga elijwayelekile, futhi ukufakwa akuhambisani nokulimala. Izinhlangano zokulawula emhlabeni jikelele ziqhubeka ziqinisekisa ukuphepha kwezithako ze-sunscreen ezivunyelwe.

Izinganekwane: I-tan ibavikela ekushiseni. Iqiniso: i-tan inikeza ukuvikelwa okuphelele okungama-SPF 3 kuya ku-4, okungaphansi, futhi i-tan uqobo iyisibonakaliso esibonakalayo sokulimala kwe-DNA okwandisa ingozi yomdlavuza. Izinganekwane: Udinga i-sunscreen kuphela ehlobo.

Iqiniso: i-UVA radiation, ebangela ukuvuthwa futhi ifaka isandla kumdlavuza, ikhona unyaka wonke futhi ingena ngengilazi. Ukufaka i-sunscreen nsuku zonke, kungakhathaliseki isikhathi, kuyisinyathelo esisebenzayo kakhulu sokuvikela kokunciphisa ingozi yomdlavuza wesikhumba nokugcina isikhumba esisha, esinombala ofanayo empilweni yonke.