Izithako eziSwashini ezivimbela i-UVA Radiation
Kungenzeka ukuthi uzwile ukuthi amanye ama-sunscreen angeke akuvikele ngokwanele imiphumela emibi yelanga nokuthi udinga ukuqonda ngaphezu kwenombolo elebula. Lezi zimpendulo ziyiqiniso, futhi kubalulekile ukuzifundisa ezithandweni ozidingayo esikrinini selanga. Ake sixoxe ukuthi kungani lokho, nokuthi yini okudingeka ukwazi ngaphambi kokuthenga isikrini selanga.
Ukuvikelwa kwelanga kanye ne-UV Rays
I-sunscreen imikhiqizo ebalulekile yokunakekelwa kwesikhumba esetshenziselwa ukuvimbela isithombe-mzimba nomdlavuza wesikhumba. Kuze kwaba yamuva kwakucatshangwa ukuthi ukuvimbela imisebe ye-UVB nokushisa kwelanga kwakuwukuphela kwezinyathelo ezidingekayo zokuvimbela ukulimala kwelanga. Isilinganiso se-SPF sakhiwe ukukala ikhono le-sunscreen ukuvimba imisebe ye-UVB.
Manje siyazi ukuthi imisebe ye-UVA nayo ilimaza isikhumba. Nakuba i-FDA ihlongoze uhlelo lokulinganisela olukuvumela ukuthi i-sunscreen iqede kahle i-UVA, leso siphakamiso asikavunyelwe. Ngeshwa, indlela kuphela yokukwazi mayelana nekhono lokuvimbela i-UVA yesikrini selanga ukuthi ubheke okungenani elilodwa lalezi zithako.
Ama-sunscreen Okuvimbela ukushisa kwe-UVA
Uma ubheka isikrini selanga, kuyadingeka ukufunda ilebula futhi uqiniseke ukuthi enye yezithako okukhulunywe ngazo lapha kuhlu. Ungathembi ulwazi lokufaka amaphakheji athi i-sunscreen "ihamba phambili" noma "iphelele." Yenza ukukhetha kwakho okufundiwe ngokusekelwe ocwaningweni lwakho.
Ungase ufise ukubuka izinketho ezahlukene zezithako ezivikela emiphakathini ye-UVA ukunquma ukuthi yikuphi okuhle okuhambisana nezidingo zakho siqu.
Avobenzone
I-Avobenzone (i-Parsol 1789) yiyona kuphela imakhemikhali ethatha yonke i-spectrum ye-UVA kusuka ku-310-400 nm. Awuhlinzeki nganoma yikuphi ukumiswa kwe-UVB.
Inkinga ne-avobenzone yukuthi ihlehla ekukhanyeni kwelanga. Eqinisweni, amaphesenti angu-50 kuya kwangu-90 alolukhuni olushona ilanga lilahleka ihora elilodwa emva kokuchayeka kwelanga. Amanye ama-absorber e-UVB afana ne-OMC ne-octocylene enza i-avobenzone igxilile kakhulu.
- Izinzuzo: Ivimbela i-spectrum egcwele ye-UVA futhi ayibangeli ukucasula isikhumba
- Ukungalungi: Iphumula ngokushesha ekukhanyeni kwelanga ngaphandle kokuba ihlanganiswe nabathile abathile be-UVB
Benzophenones
I-benzophenones, i-oxybenzone, ne-dioxybenzone yizikhwama ezixubekile zezakhiwo ezinhle nokubi. Ziyisithako esivamile hhayi kuphela emasimini asetsheni kodwa nasezindwangu zokuzivikela ze-UV. Ziyi-absorption ezinhle ze-UVA kodwa nazo zithatha uhla lwe-UVB. I-benzophenones ayiyona into ecasulayo njenge-PABA kodwa i-oxybenzone iyisimangalisa kakhulu kuzo zonke izithako ze-sunscreen emakethe manje.
- Izinzuzo: Ukuvimbela umthamo omkhulu wemisebe ye-UV kuhlanganise ne-UVA
- Ukunganaki: Ukucasula futhi kungabi ukumelana namanzi
Helioplex
I-Helioplex iyifomula ephathelene nomnikazi kaJohnson & Johnson Neutrogena. Ukubunjwa okusha kuyinhlanganisela yama-blockers ahlukahlukene ahlukene we-UVA ne-UVB kanye nokuqiniswa okugcina izithako ezisebusweni ezithe xaxa zingaboni. I-sunscreen enhle, ebanzi kakhulu engacasuli.
Kufika kuma-SPF ka-55, 70, no-85. Izithako ezisebenzayo e-Helioplex ezinokugxila kwazo yizi:
- Avobenzone (amaphesenti angu-3)
- I-Oxybenzone (amaphesenti angu-6)
- I-octocrylene (amaphesenti angu-2,8)
- Ukuzibandakanya (amaphesenti ayishumi ku-SPF 55 no-15 amaphesenti ku-SPF 70)
- I-Octisalate (amaphesenti angu-5)
I-Mexoryl SX (i-Ecamsole)
Amanye amagama kulolu hlobo ahlanganisa isitampuli se-terephthalylidene sulfoic acid (TDSA), ecamsule, ne-Anthelios SX. I-Oreal Paris yasungula i-mexoryl futhi isetshenziswe eYurophu kusukela ngo-1982. Ngo-2006 i-FDA yavuma ukusetshenziswa kwayo e-United States. Ihlanganiswe ne-avobenzone ne-octocrylene futhi idayiswa e-US yiLa Roche Posay njengo-Anthelios SX.
Lesi sikrini selanga yisibhamu esikhulu esiphezulu esingamanzi, sithembekile kakhulu elangeni, futhi singacasuli esikhumbeni. Izithako ezisebenzayo ku-Anthelios SX ezinokugxila kwazo yizi:
- I-Ecamsule (amaphesenti angu-2)
- Avobenzone (amaphesenti angu-2)
- I-octocrylene (amaphesenti angu-10)
I-meradimate
I-meradimate iqukethe isithako se-menthyl anthranilate esihlinzeka ngokubhekezela emisebeni ye-UVA nakuba ukufakwa akuyona yonkana njengoMexoryl noma i-benzophenones.
I-Titanium Dioxide ne-Zinc Oxide
I-Titanium dioxide ne-zinc oxide kubhekwa njengabashintshi belanga kunama-sunscreens. Banikeza isivikelo emisebeni ye-UVA kodwa banqunyelwe ukubonakala kwabo okwe-opaque. Ama-sunblocks asebenza njengama-blockers, abonisa imisebe ye-UV emuva esikhumbeni.
Yisiphi isikrini se-Sunscreen esivimbela (Okunye kuneKhansela Yesikhumba) - I-Caveat
Sonke sizwile okuningi ngokubaluleka kwesikrini selanga, kodwa lokho okuthola okungakhulunywa kakhulu kungenye yezici ezimbi zokuvimbela leyo mililo evuthayo ekufinyeleleni isikhumba sethu.
Kukhona ucwaningo oluningi olusikisela ukuthi uthola uvithamini D olwanele luyasiza ekuvimbeleni okungenani izinhlobo ezihlukene ezingama-27 zomdlavuza, kufaka phakathi i- melanoma , ne-sunscreen evimbela ukushisa kwelanga kuphela kodwa ukungena kwe-vitamin D ngesikhumba sethu.
Lokhu akusho ukweqa isikrini selanga. Khuluma nodokotela wakho. Abanye odokotela batusa ukulibazisa ukusetshenziswa kwelanga kuze kube yilapho usukhona elangeni emaminithi angu-10 kuya kwangu-15-isikhathi esithathayo ukuthola umthamo onempilo wevithamini D. Izinhlangano eziningana ze-dermatology ziyacabangela kabusha izincomo zelanga zesikrini ngenxa yalesi sizathu.
Kunzima kakhulu ukuthola wonke u-vitamin D owudinga ngendlela yokudla yodwa, kanti izithasiselo zika vithamini D3 yindlela enye yokuthola i-vitamin D. Into engcono kakhulu ukuthi ungathola kalula uma udinga i-vitamin D ngaphezulu ngokuhlolwa kwegazi okulula. Khumbula ukuthi ububanzi obuvamile bukhulu kakhulu. Isibonelo, ibhubhu lakho lingase libike ukuthi izinga lama-30 kuya ku-80 livamile, kodwa ezinye izifundo zisho ukuthi amazinga angama-50 kuya ku-80 ayenhle ukunciphisa ingozi yomdlavuza. Ngakho njalo ucele inombolo yakho futhi. Inani elanele lamavithamini D lingakusiza ukunciphisa ingozi yomdlavuza, kepha okweqile kungabangela izinso ezibuhlungu zezinso. (Futhi yebo, ingxenye yobuhle bokuthola i-vitamin D yakho elangeni ukuthi awukwazi ukuthola okuningi.)
Imithombo:
Freitas, J., noL. Gaspar. In Vitro Photosafety and Efficacy Screening of Apigen, Chrysin, neBeta-Carotene for UVA kanye VIS Protection. I-European Journal yeSayensi Yezokwelapha . 2016. 89: 146-53.
Stiefel, C., noW. Schwack. Ukwenziwa kwe-Photo in Times Changing - UV Filter Ukusebenza Nokuphepha, Izinqubo Sensitization kanye Izimo Ezilawulayo. I-International Journal of Cosmetic Science . 2015. 37 (1): 2-30.