Yuav ua li cas decipher sunscreen labels

Kuv ntxub hais rau koj qhov no, tab sis nws tsis txaus los nqa cov tshuaj pleev thaiv hnub qub tawm ntawm lub khw muag tshuaj thiab siv rau koj cov tawv nqaij. Txhawm rau kom paub tseeb tias koj tab tom xaiv cov qauv tsim nyog rau koj hom tawv nqaij thiab xav tau (thiab siv nws txoj cai!), koj yuav tsum tau nyeem txhua yam khoom daim ntawv lo ua ntej. Nws yog txhua yam zoo thiab dandy txog thaum koj paub tias koj tsis muaj lub tswv yim dab tsi cov lus zoo nkauj-suab ntawm daim ntawv lo txawm txhais tau tias. Qhia qhov tseeb: koj puas paub lub ntsiab lus ntawm cov kab lus xws li "Broad Spectrum" thiab "SPF"? Yuav ua li cas yog "dej-resistant" thiab "kev ua si nawv"? Yog hais tias cov lus teb yog, ces kudos rau koj! Mus rau, mus rau. Yog tias cov lus teb tsis yog, koj yuav xav nyeem qhov no. Hauv qab no peb qhia txog kev sib tsoo hauv kev txiav txim siab tshuaj pleev thaiv hnub. Thiab qhov ntawd tsis yog tag nrho! Tsuas yog nyob rau lub caij ntuj sov, peb kuj tau sib qhia cov kev coj ua zoo tshaj plaws rau kev xaiv cov tshuaj pleev thaiv hnub uas tuaj yeem muab koj cov tawv nqaij tiv thaiv nws tsim nyog thiab, ncaj ncees, xav tau.

BROAD SPECTRUM SUN CREAM yog dab tsi?

Thaum lub tshuaj pleev thaiv hnub hais tias "Broad Spectrum" ntawm daim ntawv lo, nws txhais tau hais tias cov qauv tuaj yeem pab tiv thaiv koj cov tawv nqaij los ntawm lub hnub teeb meem UVA thiab UVB rays. Raws li ib tug refreshing neeg sawv cev, UVA rays tuaj yeem ua rau cov tsos mob ntxov ntxov ntawm cov tawv nqaij laus, xws li pom wrinkles thiab hnub nyoog me ntsis. UVB rays, ntawm qhov tod tes, feem ntau yog lub luag haujlwm rau kev tshav ntuj thiab lwm yam kev puas tsuaj ntawm daim tawv nqaij. Thaum cov tshuaj pleev thaiv hnub muaj kev tiv thaiv dav dav, nws tuaj yeem pab tiv thaiv cov tsos mob ntawm daim tawv nqaij thaum ntxov, tshav kub kub, thiab mob qog noj ntshav thaum siv nrog lwm yam kev tiv thaiv hnub ci. (Psst - qhov ntawd zoo heev!).

SPF yog dab tsi?

SPF sawv cev rau "kev tiv thaiv hnub ci". Tus lej cuam tshuam nrog SPF, txawm tias nws yog 15 lossis 100, txiav txim siab npaum li cas UV (hluav taws xob) tshuaj pleev thaiv hnub tuaj yeem pab lim tawm. Piv txwv li, American Academy of Dermatology (AAD) thov tias SPF 15 tuaj yeem lim tawm 93% ntawm lub hnub UVB rays, thaum SPF 30 tuaj yeem lim tawm 97% ntawm lub hnub UVB rays.

WATERPROOF SUN CREAM yog dab tsi?

Lus nug zoo! Vim tias hws thiab dej tuaj yeem ntxuav cov tshuaj pleev thaiv hnub tawm ntawm peb cov tawv nqaij, cov tuam txhab tsim cov tshuaj pleev thaiv hnub tsis muaj dej, uas txhais tau hais tias cov mis yuav nyob ntawm cov tawv nqaij ntub dej rau ib lub sijhawm. Qee cov khoom siv dej tsis zoo txog li 40 feeb hauv dej, thaum lwm tus tuaj yeem nyob hauv dej ntev txog 80 feeb. Saib daim ntawv lo ntawm koj cov tshuaj pleev thaiv hnub rau cov lus qhia txog kev siv kom raug. Piv txwv li, yog tias koj phuam qhuav tom qab ua luam dej, koj yuav tsum tau rov qab tshuaj pleev thaiv hnub tam sim ntawd, vim nws yuav zoo li rub tawm hauv cov txheej txheem.

Editor's note: Thaum siv cov tshuaj pleev thaiv hnub tsis muaj dej, nco ntsoov rov qab siv cov tshuaj tsawg kawg txhua ob teev, txawm tias koj cov tawv nqaij tseem qhuav.

YUAV UA LI CAS YUAV TSUM PAUB TXOG CHEMICAL thiab PHYSICAL SUN CREAM?

Kev tiv thaiv tshav ntuj tuaj nyob rau hauv ob hom: lub cev thiab tshuaj pleev thaiv hnub. Cov tshuaj pleev thaiv hnub lub cev, feem ntau tsim nrog cov khoom xyaw nquag xws li titanium dioxide thiab / lossis zinc oxide, pab tiv thaiv daim tawv nqaij los ntawm kev cuam tshuam lub hnub rays deb ntawm daim tawv nqaij. Tshuaj pleev thaiv hnub, feem ntau tsim nrog cov khoom xyaw xws li octocrylene lossis avobenzone, pab tiv thaiv daim tawv nqaij los ntawm kev nqus UV rays. Kuj tseem muaj qee cov tshuaj pleev thaiv hnub uas tau muab cais ua lub cev thiab tshuaj pleev thaiv hnub raws li lawv qhov muaj pes tsawg leeg. 

"Baby" txhais li cas rau ntawm Sun CREAM?

FDA tsis tau txhais lo lus "me nyuam yaus" rau tshuaj pleev thaiv hnub. Feem ntau hais lus, thaum koj pom lo lus no ntawm daim ntawv lo tshuaj pleev thaiv hnub, nws txhais tau hais tias cov tshuaj pleev thaiv hnub yuav muaj titanium dioxide thiab / lossis zinc oxide, uas tsis tshua muaj qhov ua rau tus me nyuam cov tawv nqaij rhiab heev.

Dab tsi yog "SPORT" ON SUN CREAM?

Raws li nrog "cov menyuam yaus," FDA tsis tau txhais lo lus "kev ua si nawv" rau tshuaj pleev thaiv hnub. Raws li Consumer Reports, "kev ua si" thiab "active" khoom zoo li hws thiab / los yog dej resistant thiab tsis tshua ua rau koj ob lub qhov muag. Thaum tsis ntseeg, xyuas daim ntawv lo.

ZOO TSHAJ PLAWS 

Kuv vam tias tam sim no koj muaj kev nkag siab zoo ntawm qee cov ntsiab lus uas siv los ntawm cov tshuaj pleev thaiv hnub. Ua ntej mus rau lub tsev muag tshuaj thiab sim koj cov kev paub tshiab ntawm cov ncauj lus no, muaj ob peb lub ntsiab lus ntxiv uas yuav tsum nco ntsoov. Ua ntej, tam sim no tsis muaj tshuaj pleev thaiv hnub tuaj yeem lim tawm 100% ntawm lub hnub UV rays. Yog li ntawd, nws yog ib qho tseem ceeb uas yuav tsum hnav khaub ncaws tiv thaiv, nrhiav kev ntxoov ntxoo, thiab tsis txhob muaj lub hnub ci siab tshaj plaws (10 teev sawv ntxov txog 4 teev tsaus ntuj thaum lub hnub ci ntsa iab ntawm lawv qhov muaj zog tshaj) ntxiv rau kev siv tshuaj pleev thaiv hnub. Tsis tas li ntawd, txij li tus lej SPF tsuas yog siv rau hauv tus account UVB rays, nws yog ib qho tseem ceeb los tiv thaiv cov teeb meem sib npaug ntawm UVA rays. Txhawm rau npog tag nrho koj cov hauv paus, AAD pom zoo kom siv dav spectrum SPF ntawm 30 lossis siab dua uas tseem tiv taus dej. Feem ntau, daim ntawv thov tshuaj pleev thaiv hnub zoo yog txog ib ooj - txaus los sau cov iav txhaj tshuaj - los npog qhov chaw ntawm lub cev. Tus lej no yuav txawv raws li koj qhov loj me. Thaum kawg, rov siv cov tshuaj pleev thaiv hnub qub qub txhua ob teev, lossis ntau zaus yog tias koj tawm hws lossis phuam so ntau.