Muna 2019, iyo US FDA yakazivisa chisungo chitsva ichiti pakati pegumi nematanhatu ezuva rinoshanda zvinongedzo pamusika weUS, zinc oxide uye titanium dioxide inowedzerwa kune zvigadzirwa zvezuva se "GRASE" (Inowanzo zivikanwa seyakachengeteka uye inoshanda).PABA neTrolamine Salicylate haisi "GRASE" yekushandiswa mune sunscreens nekuda kwekuchengetedza nyaya.Zvisinei, izvi zvinyorwa zvinotorwa kunze kwemamiriro ezvinhu, uye zvinonzwisiswa kuti chete muviri sunscreen agents-nano zinc oxide uye titanium dioxide-yakachengeteka uye inobudirira mumishonga yezuva yezuva, mamwe makemikari ezuva haana kuchengeteka uye anoshanda.Kutaura zvazviri, kunzwisisa kwakarurama ndekwekuti kunyange zvazvo US FDA ichiona nano-zinc oxide uye titanium dioxide se "GRASE", hazvirevi kuti mamwe gumi nemaviri emakemikari ezuva haasi GRASE, asi achiri kushaya ruzivo rwakakwana rwekuchengetedza kuratidza. .Panguva imwecheteyo, iyo FDA iri kukumbirawo makambani akakodzera kuti ape data rakawanda rekutsigira kuchengetedza.
Pamusoro pezvo, iyo FDA yakaitawo ongororo yekiriniki ye "sunscreen absorption kuburikidza neganda muropa" uye yakaona kuti mamwe masikirwo ezuva anoshanda mumashizha ezuva, kana akabatwa nemuviri padanho repamusoro, anogona kukonzera matambudziko ehutano.ngozi.Pakangoburitswa mhedzisiro yekuedza, yakamutsa kurukurirano yakapararira pasi rose, uye zvishoma nezvishoma yakakonzera kusanzwisisana nevatengiwo zvavo vaisaziva chokwadi.Vaitenda zvakananga kuti sunscreens inogona kupinda muropa uye haina kuchengetedzeka kumuviri wemunhu, uye kunyange imwe-sidedly yaitenda kuti sunscreens yaikuvadza kune hutano uye haigone kushandiswa.
Zvinonzi FDA yakatora vazvipiri ve24, yakakamurwa kuva mapoka mana, uye yakaedzwa masiki ezuva ane 4 akasiyana-siyana ezuva mufomu.Kutanga , vazvipiri vakapa 75% yeganda rose remuviri, maererano nechiyero cheyero ye 2mg/cm2, 4 kanomwe pazuva kwemazuva mana akateedzana kushandisa sunscreen.Zvadaro, sampuli dzeropa dzevazvipiri dzakaunganidzwa kwemazuva 7 akatevedzana uye zvinyorwa zvezuva muropa zvakaedzwa.Zvidzidzo zvakaratidza kuti nzvimbo yeganda remunhu mukuru inenge 1.5-2 ㎡.Tichifunga kukosha kweavhareji ye1.8 ㎡, kana ikaverengerwa zvichienderana nechiyero chakajairwa, kushandiswa kwezuva nevanozvipira kunenge 2 × 1.8 × 10000/1000 = 36g mukuedza, uye huwandu hwe4 kanomwe pazuva 36 × 4= 144g.Kazhinji, nzvimbo yeganda rechiso inenge 300-350cm², kushandiswa kumwe chete kwezuva kunokwana kuchengetedza zuva rose.Nenzira iyi, iyo yakaverengerwa kushandiswa kwemari ndeye 2 × 350/1000 = 0.7g, kunyange kana repaint ichibatanidzwa, inenge 1 .0 ~ 1.5g.Kana kutora s huwandu hwehuwandu hwe1.5 gramu, kuverenga ndeye 144 / 1.5 = 96 nguva .Uye huwandu hwezuva rinoshandiswa nevanozvipira kwemazuva mana akatevedzana 144 × 4 = 576g, nepo zuva rega rega rezuva rinoshandiswa nevanhuwo zvavo. Mazuva mana ari 1.5×4=6g.Naizvozvo, musiyano uripo pakati peyero ye576 magiramu uye 6 magiramu ezuva rakakura kwazvo uye kukanganisa kuri pachena.
Mishonga yezuva yakaedzwa neFDA muchiyedzo ichi yaive benzophenone-3, octoclilin, avobenzone, uye TDSA.Pakati pavo, chete data yekuona yebenzophenone-3 inodarika iyo inonzi "safety value", inenge 400 nguva inodarika chiyero, octocrylene uye avobenzone zvose zviri mukati me10 nguva, uye p-xylylenedicamphorsulfonic acid Haisi kuonekwa.
Nechinoti, kuenderera kwepamusoro-kusimba kushandiswa kwezuva kunokonzeresa mhedzisiro.Hazvishamisi kuti kunyange sunscreens inowanikwa muropa pasi pemamiriro ezvinhu akadaro ekuedzwa.Sunscreens yakagamuchirwa uye yakashandiswa kweanopfuura makumi emakore, nyika dzakawanda dzakagadzirisa sunscreens semishonga, uye kusvika ikozvino hapana tsvakurudzo yakakwana yekutsvakurudza kuratidza kuti ine systemic side effects pamuviri womunhu.
Nguva yekutumira: Sep-09-2022
