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Kudzivirira zuva chinhu chakakosha kuvakadzi vemazuva ano gore rose. Kudzivirira zuva hakungodzikisi chete kukuvara kwemwaranzi ye ultraviolet paganda, asiwo kudzivirira kukwegura kweganda nezvimwe zvirwere zveganda zvine chekuita nazvo. Zvishandiso zvekudzivirira zuva zvinowanzogadzirwa nemuviri, makemikari, kana musanganiswa wemarudzi ese ari maviri uye zvinopa dziviriro ye UV yakawanda. Kuti zvikubatsire kutenga zviri nani sunscreen yavo mune ramangwana, nhasi tinokutora kubva kumakemikari anoshanda uye physical active ingredients kuti uongorore zvinoshandisa sunscreen.

Chinhu chinoshanda chemakemikari

Octyl methoxycinnamate

Octyl methoxycinnamate (OMC)ndeimwe yemishonga inonyanya kushandiswa pakudzivirira zuva. Octyl methoxycinnamate (OMC) iUVB filter ine UV absorption curve yakanaka ye280 ~ 310 nm, high absorption rate, kuchengetedzeka kwakanaka, chepfu shoma, uye kunyungudika kwakanaka kwezvinhu zvakagadzirwa nemafuta. Inozivikanwawo seoctanoate uye 2-ethylhexyl 4-methoxycinnamate. Musanganiswa uyu wakatenderwa sechinongedzo chekushongedza muUnited States neEuropean Union (EU) pahuwandu hwe7.5-10%.

Benzophenone-3

Benzophenone-3(BP-3) iganda rezuva rinonyungudika nemafuta rinonyungudika rinotora UVB nemwaranzi pfupi yeUVA. BP-3 inonyungudika nekukurumidza pasi pemwaranzi ye ultraviolet, zvichideredza kushanda kwayo uye zvichigadzira huwandu hwakawanda hwemhando dzeokisijeni dzinoshanda. MuUnited States, huwandu hwakanyanya hweBP-3 muganda rezuva i6%.

Benzophenone -4

Benzophenone-4(BP-4) inowanzoshandiswa semushonga we ultraviolet absorber pahuwandu hunosvika 10%. BP-4, kufanana neBP-3, imhando ye benzophenone derivative.

4-methylbenzyl camphor

4-methylbenzylidene camphor (4-methylbenzylidene camphor, 4-MBC) kana kuti enzacamene imhando ye organic camphor inoshandiswa semushonga weUVB mu sunscreen nezvimwe zvizoro. Kunyangwe mushonga uyu usingatenderwe neUS Food and Drug Administration (FDA), dzimwe nyika dzinobvumira kushandiswa kwemushonga uyu muhuwandu hunosvika 4%.

4-MBC chinhu chinouraya mafuta akawanda chinogona kunyudzwa neganda uye chiripo munyama dzemunhu, kusanganisira placenta. 4-MBC ine simba rekukanganiswa kwe estrogen endocrine, ichikanganisa thyroid axis uye ichidzivisa kushanda kweAChE. Saka, ganda rine zvinhu izvi rinofanira kushandiswa nekungwarira.

3-benzal camphor

3-benzylidene camphor (3-BC) chinhu chinobatsira pakuderedza mafuta mumuviri chakabatana ne4-MBC. Kuwanda kwayo kunoshandiswa muzvigadzirwa zvekudzivirira zuva muEuropean Union i2%.

Kufanana ne4-MBC, 3-BC inotsanangurwawo sechinhu chinokanganisa estrogen. Pamusoro pezvo, 3-BC yakataurwa kuti inokanganisa CNS. Zvakare, mafuta ekudzivirira zuva ane zvinhu izvi anofanira kushandiswa nekungwarira.

Octylene

Octocrtriene (OC) iester iri muboka recinnamate rinotora mwaranzi yeUVB neUVA, ine huwandu hunosvika 10% muzvizoro zvezuva uye zvizoro zvezuva nezuva.

Chinhu chinoshanda mumuviri

Zvinhu zvinoshandiswa pakudzivirira zuva zvinowanzova titanium dioxide (TiO2) uye zinc oxide (ZnO2), uye huwandu hwazvo hunowanzova 5-10%, kunyanya nekuratidza kana kuparadzira mwaranzi ye ultraviolet (UVR) kuti zvizadzise chinangwa chekudzivirira zuva.

Titanium dioxide

Titanium dioxide imineral chena yakaita sehupfu inoumbwa netitanium neokisijeni. Titanium dioxide inoshandiswa zvakanyanya muzvikafu uye muzvizoro, kunyanya nekuda kwekuchena kwayo uye kushanda zvakanaka kweUV sunscreens.

Zinc oxide

Zinc oxide ipfu chena ine hunhu hwekudzivirira nekuchenesa. Inodzivirirawo ganda rezuva reUV rinoratidza mwaranzi yeUVA neUVB. Pamusoro pezvo, zinc ine hunhu hwekudzivirira kuzvimba, kuomesa uye kuomesa. Zinc oxide, mushonga wekudzivirira ganda unozivikanwa sewakachengeteka uye unoshanda neUS Food and Drug Administration, ndeimwe yadzo.

Mushure mekutsanangurwa kwechinyorwa chino, mava kunzwisisa zviri nani here nezvezvinhu zvinoshanda zve sunscreen? Ndapota ndibatei kana muine mimwe mibvunzo.