Muna 2019, iyo FDA yeUS yakazivisa chirevo chitsva ichitaura kuti pakati pegumi nematanhatu Spect Paba neTrolamine Salicylate hadzisi "Grate" yekushandisa mune sunscors nekuda kwenyaya dzekuchengetedza. Nekudaro, izvi zvirimo zvinobviswa kubva mumamiriro ezvinhu, uye zvinongonzwisiswa kuti chete muumbi wezuva reSunscreen uye titanium dioxide Muchokwadi, nzwisiso chaiyo ndeyekuti kunyangwe iyo US FDA-zinc oxide uye titanium dioxide kuti "zvinoregedza kuti mamwe magetsi emakemikari ezuva haashaiwi, asi vachiri kushaya data rakaringana rekuchengetedza kuratidza. Panguva imwecheteyo, FDA irikubvunzawo makambani akakodzera kuti apezve kuchengetedza data rokuchengetedza.
Uyezve, Fda zvakare akaitisawo muyedzo wekutongwa " njodzi. Pangangoitika muedzo uyu paakangobudiswa, vakamutsa kukurukurirana kwakapararira pasi rose, uye zvishoma nezvishoma vakaita kusanzwisisana nevatengi vaisaziva chokwadi. Vakatenda zvakananga kuti maSunsceni anogona kupinda neropa uye asina kuchengetedzeka nemuviri wemunhu, uye kunyange kutendwa nemhino kuti maSunscars aikukuvadza uye aisakwanisa kushandiswa.
Zvinonzi FDA Kutanga, vazvipiri vakapa makumi manomwe neshanu muzana emuviri weganda, zvichienderana neyakajairwa dosage ye 2mg / cm2, kagumi pazuva kwemazuva mana akateedzana kuti ashandise sunscreen. Zvadaro, samples dzevazvipiri dzakaunganidzwa kwemazuva manomwe akateedzana uye zviri mukati mezuva rakaedzwa muropa rakaedzwa. Zvidzidzo zvakaratidza kuti nzvimbo yeganda yemunhu mukuru ndeye 1.5-2 ㎡. Kufunga kukosha kwepakati kwe 1.8 ㎡, kana ichiverengerwa maererano neyakajairwa huwandu, svutugadzike Kazhinji, t iye akatarisa nzvimbo yeganda anenge 300-350cm², kushandiswa kwezuva rezuva kwakaringana kuchengetedza zuva rose. Nenzira iyi, iyo yakaverengerwa mari ndeye 2 Kana ikatora yakawanda huwandu hwe1,5 magiramu, kuverenga iri 144 / 1.5 = nguva yezuva rinoshandiswa nevarume 44 × 4 = Naizvozvo, musiyano uripo pakati pemadhora ezviuru 576 uye magiramu matanhatu ezuva rezuva rakakura kwazvo uye maitiro ari pachena.
VaSunscreens vanoedzwa neFDA mune ino kuedza kwaive Benzophenone-3, Octoctilin, avabenzone, uye tdssa. Pakati pavo, chete iyo data yekuona yaBenzopharone-3 kure inodarika "kukosha kwekuchengetedza", kanokwana-kaCocclene uye averslene mese mukati menguva gumi, uye P-XylylensidemPhomhorlfonic acid haina kuonwa.
Zvinonzwisisika, zvinoenderera mberi nekuwedzera kushandisa kwezuva kwezuva zvichaita kuti uwedzere kushanda. Hazvishamisi kuti kunyange maSunscars anoonekwa muropa mumamiriro ezvinhu akanyanya emiedzo. Sunscreens yakatenderwa uye inoshandiswa kwemakumi emakore, nyika zhinji dzakatora zuva same semishonga, uye kusvika parizvino haina data yekutsvagisa kuratidza kuti vane maitiro emuviri wemunhu.
Post Nguva: Sep-09-2022
