E haʻi aku ʻo ZHONGAN iā ʻoe: Pehea e ʻike pono ai i nā kānana UV?

I ka makahiki 2019, ua hoʻolaha ka US FDA i kahi manaʻo hou e hōʻike ana ma waena o nā mea hana sunscreen 16 i kēia manawa ma ka mākeke US, ua hoʻohui ʻia ka zinc oxide a me ka titanium dioxide i nā huahana sunscreen e like me "GRASE" (ʻike nui ʻia he palekana a maikaʻi).ʻAʻole ʻo PABA a me Trolamine Salicylate ka "GRASE" no ka hoʻohana ʻana i nā pale lā ma muli o nā pilikia palekana.Eia naʻe, lawe ʻia kēia ʻike ma waho o ka pōʻaiapili, a ua hoʻomaopopo ʻia ʻo nā mea pale kino kino wale nō-nano zinc oxide a me titanium dioxide-ua palekana a maikaʻi hoʻi i nā mea hana pale lā, ʻaʻole palekana a maikaʻi nā mea hoʻohana ʻē aʻe.ʻO ka ʻoiaʻiʻo, ʻo ka ʻike pololei ʻoiai ʻoiai ke manaʻo nei ka US FDA i ka nano-zinc oxide a me ka titanium dioxide he "GRASE", ʻaʻole ia he manaʻo ʻaʻole ʻo GRASE nā mea ʻē aʻe 12 chemical sunscreen, akā ʻaʻole lawa ka ʻikepili palekana e hōʻike ai. .Ma ka manawa like, ke noi nei ka FDA i nā hui kūpono e hāʻawi i nā ʻikepili kākoʻo palekana.

Eia kekahi, ua hana pū ka FDA i kahi hoʻokolohua lapaʻau e pili ana i ka "sunscreen absorption ma o ka ʻili i loko o ke koko" a ua ʻike ʻo kekahi mau mea hana pale lā i nā sunscreens, inā e komo ʻia e ke kino ma kahi kiʻekiʻe, hiki ke hoʻopilikia i ke olakino.pilikia.I ka wā i paʻi ʻia ai nā hopena o ka hoʻokolohua, ua hoʻāla lākou i nā kūkākūkā ākea a puni ka honua, a ua hoʻomaka mālie ka hoʻomaopopo ʻole ʻia e nā mea kūʻai maʻamau i ʻike ʻole i ka ʻoiaʻiʻo.Ua manaʻo pololei lākou he hiki ke komo i ke koko a he palekana no ke kino o ke kanaka, a ua manaʻo hoʻokahi ʻaoʻao he mea pōʻino nā pale lā i ke olakino a ʻaʻole hiki ke hoʻohana ʻia.

Ua hōʻike ʻia ua kiʻi ka FDA i 24 mau mea manawaleʻa, i māhele ʻia i 4 mau pūʻulu, a ua hoʻāʻo ʻia nā sunscreens i loaʻa i nā sunscreens like ʻole i loko o ke ʻano.ʻO ka mea mua, hāʻawi nā mea manawaleʻa i ka 75% o ka ʻili o ke kino holoʻokoʻa, e like me ke ʻano maʻamau o 2mg/cm2, 4 manawa i ka lā no 4 mau lā e hoʻohana ai i ka sunscreen.A laila, hōʻiliʻili ʻia nā laʻana koko o nā mea manawaleʻa no 7 mau lā a ua hoʻāʻo ʻia ka ʻike o ka pale lā i loko o ke koko.Ua hōʻike nā haʻawina e pili ana ka ʻili o kahi kanaka makua ma kahi o 1.5-2 ㎡.Ke manaʻo nei he awelika waiwai o 1.8 ㎡ , inā helu ʻia e like me ka nui maʻamau, ʻo ka hoʻohana ʻana o ka sunscreen d e nā mea manawaleʻa ma kahi o 2×1.8×10000/1000=36g i ka hoʻokolohua, a ʻo ka nui no 4 mau manawa i ka lā he 36×4= 144g.ʻO ka maʻamau, ʻo ka ʻili o ka maka ma kahi o 300-350cm², ua lawa ka hoʻohana ʻana i ka pale lā e pale i ka lā holoʻokoʻa.Ma kēia ala, ʻo ka helu hoʻohana i helu ʻia ʻo 2 × 350/1000=0.7g, ʻoiai inā hoʻokomo ʻia ka repaint, ma kahi o 1 .0 ~ 1.5g.Inā lawe s i ka nui loa o 1.5 grams, ʻo ka helu ʻana he 144/1.5=96 mau manawa . A ʻo ka nui o ka pale lā i hoʻohana ʻia e nā mea manawaleʻa no 4 mau lā he 144 × 4=576g, ʻoiai ka nui o kēlā me kēia lā o ka pale lā i hoʻohana ʻia e nā poʻe maʻamau no ʻO 4 mau lā he 1.5×4=6g.No laila, nui loa ka ʻokoʻa ma waena o ka dosage o 576 grams a me 6 grams o ka sunscreen a maopopo ka hopena.

ʻO nā pale lā i hoʻāʻo ʻia e ka FDA i kēia hoʻokolohua he benzophenone-3, octoclilin, avobenzone, a me TDSA.Ma waena o lākou,ʻo kaʻikepiliʻike wale nō o benzophenone-3 iʻoi aku ma mua o ka mea i kapaʻia "waiwai palekana", ma kahi o 400 mau manawa ma mua o ka maʻamau, octocrylene a me avobenzone i loko o 10 manawa, a me ka p-xylylenedicamphorsulfonic acid ʻAʻole iʻikeʻia.

ʻO ka manaʻo, ʻo ka hoʻohana mau ʻana i ka sunscreen ka hopena kumulative.ʻAʻole ia he mea kupanaha ke ʻike ʻia nā sunscreens i loko o ke koko ma lalo o nā kūlana hoʻāʻo koʻikoʻi.Ua'āponoʻia a hoʻohanaʻia nā Sunscreens no nā makahiki he nui, ua hoʻoponopono nā'āina he nui i nā lāʻau lapaʻau e like me nā lāʻau lapaʻau, a hiki i kēia manawa,ʻaʻole lawa kaʻikepili noiʻi e hōʻoia i ka loaʻaʻana o nā hopena ma ke kino o ke kanaka.