Ngo-2019, i-FDA yase-US yabhengeza isindululo esitsha esichaza ukuba izithako ezi-16 ezisebenzayo okwangoku kwimarike yaseMelika, iZinc dioxide yongezwa kwiimveliso ze-titanium njenge "greyse" (ekhuselekileyo). I-Paba kunye ne-trollamiminel yesandla i-salicylate ayisiyi "grat" ukuba isetyenziswe kwiiSckipreens ngenxa yemicimbi yokhuseleko. Nangona kunjalo, lo mxholo ukhutshiwe ngaphandle komxholo, kwaye kuyaqondakala ukuba kuphela i-Agescreen Ages-Ages ye-Nano ye-titanium-ikhuselekile kwaye isebenza kwizithako ezisebenzayo ze-titanium, ezinye ii-archen ze-sucken azikhuselekanga kwaye azisebenzi. Ngapha koko, ukuqonda okuchanekileyo kukuba nangona i-FDA ithathela ingqalelo i-nano-zinc dianide kunye neTitanium dioxide, kodwa ayithethi ukuba ezinye ii-Arhente zeSckickis zelanga azizizo, kodwa zisenokungabikho kwedatha yoKhuseleko olwenziweyo. Kwangelo xesha, i-FDA ikwacela iinkampani ezifanelekileyo ukuba zinike idatha yenkxaso yokhuseleko.
Ukongeza, i-FDA iqhube ilityeli leklinikhi kwi "ye-sunsccreen yokufakelwa kulusu kwigazi" kwaye yafumanisa ukuba ezinye izithako ezisebenzayo zelanga kwi-sunscreen kwi-sunscren, ukuba zingena emzimbeni kwinqanaba eliphezulu, zinokubangela iingxaki zempilo. umngcipheko. Nje ukuba iziphumo zolindelo zapapashwa, zavelisa ingxoxo ekhuselweyo kwihlabathi liphela, kwaye ngokuthe ngcembe zabangela ukungaqondani ngabathengi abaqhelekileyo ababengayazi inyaniso. Banokholo lokuba i-Suncreens ingangena egazini kwaye ayikhuselekanga emzimbeni womntu, kwaye inye inyene yayikholelwa ukuba i-surcreens iyingozi yempilo kwaye ayinakusetyenziswa.
Kuxelwe ukuba i-FDA yaqengqeleka amatsha-ntliziyo angama-24, eyahlulahlulwe ngokwamaqela ama-4, kwaye ihlole ilanga eline-4 ezahlukeneyo zelanga kwifomula. Okokuqala, amavolontiya anegalelo eli-75% lomzimba wonke, ngokomgangatho oqhelekileyo we-2MG / CM2, izihlandlo ezi-4 ngosuku kwiintsuku ezi-4 ngokulandelelana ukuze asebenzise ilanga. Emva koko, iisampulu zegazi zamavolontiya zaziqokelelwa kwiintsuku ezisi-7 zilandelelana kwaye umxholo weSctrin egazini wavavanywa. Izifundo zibonakalise ukuba indawo yolusu yomntu omdala malunga ne-1.5-2 ㎡. Ukuthatha ixabiso eliphakathi le-1.8 ㎡, ukuba ibalwa ngokwexabiso eliqhelekileyo, ukusetyenziswa kwelanga i-D ngamavolontiya malunga ne-2 × 1.00 = 4 = 14 = 144G. Ngokwesiqhelo, indawo yobuso bolusu imalunga ne-300-30cm², isicelo esinye selanga sanele ukukhusela usuku lonke. Ngale ndlela, imali ebaliweyo yi-2 × 350/1000 = 0.7g, nokuba iposi ifakiwe, imalunga ne-1 .0g. Ukuba uthatha imali ephezulu ye-1.5 yeegrem, ukubala yi-144 / 1.5 = ama-96 amaxesha asetyenziswayo ngamavolontiya asetyenziswa ngabantu abaqhelekileyo kwiintsuku ezi-4 yi-1,5 × 4 = i-4 = 6 g. Ke ngoko, umahluko phakathi komthamo weegram ezingama-576 kunye neegram ezi-6 zeSctrin ezinkulu kwaye impembelelo icacile.
I-Sunscreens ihlolwe yi-FDA kolu vavanyo yayingu-Benzophenone-3, i-octoclilin, i-Avobiclinin, i-Avobinzone ne-TSSA. Phakathi kwazo, kuphela idatha ebonakalayo yeBenzopheNone-3 Ukudlula okubizwa ngokuba "ngexabiso lokhuseleko", malunga nama-400 amaxesha aphezulu, kunye ne-octocrylene kunye ne-Avobinclenzaedleamine-phonedic acid ayifumaneki.
Ithiyori, ngokuqhubekayo ukusetyenziswa okukhulu kwe-sunscreen kuya kubangela isiphumo esikhawulezayo. Akumangalisi ukuba nelanga lifunyenwe kwigazi phantsi kweemeko zovavanyo olugqithisileyo. I-Sunscreens ivunyiwe kwaye isetyenziselwa ngaphezulu kweshumi leminyaka, amazwe amaninzi alawula ilanga njengamayeza, kwaye ukuza kuthi ga ngoku akukho datha yophando eyaneleyo yokubonisa ukuba baneziphumo ebezingalindelekanga emzimbeni womntu.
IXESHA LOKUQALA: UPE-09-2022
