nūhou

He mea pono ka pale ʻana i ka lā no nā wahine hou i ka makahiki. ʻAʻole hiki i ka pale o ka lā ke hōʻemi wale i ka pōʻino o nā kukuna ultraviolet ma ka ʻili, akā pale pū kekahi i ka ʻelemakule a me nā maʻi pili pili. Hana ʻia nā mea pale lā i ke kino, kemika, a i ʻole ka hui ʻana o nā ʻano ʻelua a hāʻawi i ka pale UV ākea ākea. I mea e kōkua ai iā ʻoe e kūʻai maikaʻi i kā lākou pale lā i ka wā e hiki mai ana, i kēia lā e lawe iā ʻoe mai nā mea hana kemika a me nā mea hana kino e nānā i nā mea pono o ka pale lā.

Mea hana kemika

Octyl methoxycinnamate

Octyl methoxycinnamate (OMC)ʻo ia kekahi o nā lāʻau pale lā i hoʻohana pinepine ʻia. ʻO Octyl methoxycinnamate (OMC) he kānana UVB me ka pale o ka absorption UV maikaʻi o 280 ~ 310 nm, kiʻekiʻe absorption rate, palekana maikaʻi, liʻiliʻi liʻiliʻi, a me ka solubility maikaʻi i nā mea momona. ʻIke pū ʻia ʻo octanoate a me 2-ethylhexyl 4-methoxycinnamate. Ua ʻae ʻia ka hui ma ke ʻano he mea hoʻonaninani ma ʻAmelika Hui Pū ʻIa a me ka European Union (EU) ma nā ʻano o 7.5-10%.

Benzophenone-3

Benzophenone-3(BP-3) he ʻaila-soluble broad-band organic sunscreen e hoʻopaʻa i nā kukui UVB a me nā kukui UVA pōkole. Hoʻopili koke ʻia ka BP-3 ma lalo o ka radiation ultraviolet, e hōʻemi ana i kona pono a hana i ka nui o nā ʻano oxygen reactive. Ma ʻAmelika Hui Pū ʻIa, ʻo ka nui o ka ʻae ʻia o ka BP-3 i ka sunscreen he 6%.

Benzophenone -4

Benzophenone-4(BP-4) hoʻohana maʻamau e like me ka ultraviolet absorber ma ka hoʻopaʻa ʻana a hiki i 10%. ʻO BP-4, e like me BP-3, he derivative benzophenone.

4-methylbenzyl camphor

ʻO 4-methylbenzylidene camphor (4-methylbenzylidene camphor, 4-MBC) a i ʻole enzacamene he mea hoʻoheheʻe camphor organik i hoʻohana ʻia ma ke ʻano he UVB absorber i nā sunscreens a me nā mea hoʻonaninani ʻē aʻe. ʻOiai ʻaʻole ʻae ʻia ka pūhui e ka US Food and Drug Administration (FDA), ʻae ʻia nā ʻāina ʻē aʻe i ka hoʻohana ʻana i ka pūhui i nā ʻike a hiki i ka 4%.

ʻO 4-MBC kahi mea lipophilic nui loa i hiki ke komo i loko o ka ʻili a aia i loko o nā ʻiʻo kanaka, me ka placenta. Loaʻa ka 4-MBC i ka hopena o ka estrogen endocrine disruption, e pili ana i ka axis thyroid a me ke kāohi ʻana i ka hana o AChE. No laila, pono e hoʻohana ʻia ka pale lā me ka akahele.

3-benzal camphor

ʻO 3-benzylidene camphor (3-BC) kahi pūhui lipophilic pili loa i ka 4-MBC. ʻO ka manaʻo nui loa o ia mea i hoʻohana ʻia i nā huahana sunscreen ma ka European Union he 2%.

E like me 4-MBC, ua wehewehe ʻia ʻo 3-BC ma ke ʻano he estrogen-disrupting agent. Eia kekahi, ua hōʻike ʻia ʻo 3-BC e pili ana i ka CNS. Eia hou, pono e hoʻohana ʻia ka sunscreen me kēia mau mea me ka akahele.

Octylene

ʻO Octocrtriene (OC) he ester no ka hui cinnamate e hoʻopaʻa i nā kukui UVB a me UVA, me ka hoʻopaʻa ʻana a hiki i ka 10% i nā pale lā a me nā mea hoʻonaninani i kēlā me kēia lā.

Mea hana kino

ʻO nā mea hana kino i hoʻohana ʻia i nā pale lā he titanium dioxide (TiO 2) a me ka zinc oxide (ZnO), a ʻo kā lākou mau ʻike maʻamau he 5-10%, ma ka noʻonoʻo ʻana a hoʻopuehu paha i ka hanana ultraviolet radiation (UVR) e hoʻokō i ke kumu o ka pale lā. .

Titanium dioxide

ʻO ka Titanium dioxide he mineral pauka keʻokeʻo i haku ʻia me ka titanium a me ka oxygen. Hoʻohana nui ʻia ka Titanium dioxide i nā meaʻai a me nā mea hoʻonaninani, ʻoi aku hoʻi ma muli o kona keʻokeʻo a me ka maikaʻi o nā sunscreens UV.

Zinc oxide

ʻO Zinc oxide he pauka keʻokeʻo me nā mea pale a hoʻomaʻemaʻe. ʻO ia hoʻi kahi pale pale UV e hōʻike ana i nā kukui UVA a me UVB. Eia kekahi, aia ka zinc i nā mea anti-inflammatory, astringent a me ka maloʻo. ʻO Zinc oxide, kahi pale lā i ʻike ʻia he palekana a maikaʻi hoʻi e ka US Food and Drug Administration, ʻo ia kekahi o lākou.

Ma hope o ka wehewehe ʻana i kēia ʻatikala, ʻoi aku ka maikaʻi o kou hoʻomaopopo ʻana i nā mea hana o ka sunscreen? E ʻoluʻolu e kelepona mai iaʻu inā he nīnau ʻē aʻe kāu.