Ultraviolet, raws li lub taub hau ntawm lub chaw soj nstuam ntawm Tsoom Fwv Teb Chaws Kho Mob thiab Biological Agency Oleg Grigoriev, yog qhov txaus ntshai ntau dua li cov xov tooj tsis zoo. Koj tuaj yeem tau txais tshuaj tua kab mob ntawm ultraviolet txawm nyob rau hnub txias, tshwj xeeb tshaj yog nyob rau hauv roob, vim li ntawd nws tseem ceeb heev uas yuav tau siv tshuaj pleev thaiv hnub txhua xyoo.
Tab sis qhov twg ntawm ntau yam xaiv? Cia peb xav txog nws.
Sunscreen yog dab tsi?
Warren Vallo, tus thawj coj ntawm kev tshawb fawb ntawm Johnson & Johnson Skincare Research, ceeb toom tias daim tawv nqaij tau txais kev txhawb nqa los ntawm ultraviolet hluav taws xob, tsis yog nyob rau lub caij ntuj sov, tab sis kuj nyob rau lub caij ntuj no. Txawm hais tias koj zaum hauv qhov chaw ua haujlwm txij thaum sawv ntxov mus rau yav tsaus ntuj thiab tsis qhia koj lub qhov ntswg mus rau txoj kev thaum nruab hnub, lub teeb ultraviolet tseem nkag mus hauv lub khob (yog tias koj lub desktop nyob ze ntawm lub qhov rais, tsis txhob hnov qab txog cov qab zib).
Tsis txhob hais txog lub sijhawm thaum koj nyob nraum zoov, so hauv lub tiaj ua si, caij ski, ua luam dej - lub sijhawm no cov rays cuam tshuam rau sab saum toj ntawm daim tawv nqaij - epidermis. Yog li ntawd, SPF cream yuav tsum tau siv txhua xyoo puag ncig, thiab tsis yog thaum so ntawm lub chaw so.
Vim li cas ultraviolet thiaj li txaus ntshai?
- Hauv cov koob tshuaj ntau ntxiv, nws ua rau kev loj hlob ntawm daim tawv nqaij mob qog noj ntshav, tshwj xeeb tshaj yog melanoma.
- Ua rau cov cim ntawm kev yees duab, thawj "tswb" uas yog hnub nyoog me ntsis.
- Nws dhau los ua qhov ua rau hyperkeratosis, uas yog, thickening thiab ntau dhau ntawm stratum corneum ntawm lub epidermis.
- Ua kom pom ntxov ntxov ntawm wrinkles.
- Nws provokes txoj kev loj hlob ntawm photosensitivity thiab ua pob liab vog, uas yog nyob rau hauv ntau txoj kev zoo ib yam li cov kev ua xua, uas yog vim li cas tib neeg feem ntau yuam kev tsis ncaj ncees lawm kev kho mob.
Yuav ua li cas xaiv ib tug cream
Xyoo tas los, cov kws kho mob tshwj xeeb los ntawm Department of Dermatology ntawm Northwestern University Medical Center hauv Chicago tau kuaj xyuas cov tshuaj pleev thaiv hnub. Thiab lawv xav tsis thoob. Yuav luag ib nrab ntawm cov nyiaj (41%) tsis tau raws li cov cai tau teev tseg!
Nyob rau hauv tag nrho, 65 tshuaj pleev thaiv hnub tau raug kuaj. Ntau tus ntawm lawv tsis muaj qhov ntsuas tiv thaiv tau tshaj tawm ntawm lub ntim, qee qhov tsis muaj cov lus cog tseg dej tsis kam, thiab muaj cov uas muaj cov khoom siv tas sijhawm.
Yuav ua li cas nyob rau hauv xws li ib tug teeb meem tsis txhob ua yuam kev thaum muas thiab tsis ua ib tug neeg raug tsim txom ntawm unscrupulous manufacturers? Nov yog yam uas kws dermatologists pom zoo:
1. Qhov feem ntau lees txais kev xaiv ntawm kev tiv thaiv ntawm cov khoom no yog qhia los ntawm cov ntawv luv luv SPF (Tshav Tiv Thaiv Factor). Txawm li cas los xij, lub cim no txhais tau hais tias cov qab zib tsuas yog tiv thaiv UVB rays, uas yog, nruab nrab ntawm cov hluav taws xob ultraviolet. Thiab ces muaj ntev UVA rays. Lawv raug tiv thaiv los ntawm cov ntxaij lim dej, raug xaiv - nyob ntawm lub teb chaws - raws li PA (Kev Tiv Thaiv Qib ntawm UVA) lossis PPD (Persistent Pigment Darkening). Yog li, rau kev tiv thaiv zoo tshaj plaws, nws tsim nyog yuav cov tshuaj nplaum uas muaj ob npaug SPF thiab PA (PPD) ntawm pob.
2. Tus lej nyob ib sab ntawm cov ntawv luv qhia tau hais tias "muaj zog" kev kho mob li cas. Tus lej siab dua, qhov zoo dua. Nyob rau hauv cov ntaub ntawv ntawm SPF, tus nqi siab tshaj plaws yog 50 (qhov no muab kev tiv thaiv zoo tshaj plaws thiab pom zoo siv rau ntawm ntug hiav txwv lossis thaj chaw muaj hluav taws xob siab, piv txwv li, hauv Australia). Rau kev siv hedgehog hauv nroog, SPF 30 yuav ua. Txhua yam hauv qab 20 tsis yog kev tiv thaiv, tab sis tsuas yog kev sib tham hauv kev pom zoo rau cov neeg pluag.
Nrog PA, qib kev tiv thaiv tsis yog los ntawm cov lej, tab sis los ntawm pluses: tus nqi siab tshaj plaws yog PA + +++, qhov tsawg kawg nkaus yog PA +.
3. Kuj tseem muaj UVC rays, tab sis lawv luv dhau thiab tsis ncav cuag lub ntiaj teb, yog li koj tsis tas yuav txhawj txog lawv. Yog tias cov tshuaj pleev thaiv hnub hais tias "tiv thaiv UVC", ces qhov no yog ib qho yooj yim swindle thiab "txuas" ntawm cov neeg yuav khoom.
4. Yog tias ua tau, xaiv cov khoom uas yuav tiv taus dej thiab hws (lub pob yuav tsum tau cim "waterproof").
5. Yog tias koj siv ntau yam khoom tiv thaiv ib zaug (piv txwv li, qab zib thiab hmoov), ces thov nco ntsoov tias cov lim dej hauv qhov no tsis ntxiv. Tsuas yog ib qho yuav ua haujlwm, tus nqi siab dua. Piv txwv li, yog tias koj siv cov nplaum nplaum nrog qhov ntsuas tiv thaiv ntawm SPF 30, thiab muab SPF15 hmoov rau saum, ces kev tiv thaiv yuav tsis yog 45, tab sis tsuas yog 30.
6. Cia siab rau cov lus qhia ntawm koj cov phooj ywg tsawg dua - ntau tus kws tshaj lij thiab kws kho mob dermatologist. Nws tau raug pov thawj ntau dua ib zaug: cov lus tim khawv ntawm cov kws tshaj lij thiab cov neeg zoo tib yam sib txawv heev. Rau cov neeg zoo tib yam, kev zoo nkauj ntawm ntim thiab tsw, raws li nws hloov tawm, yog qhov tseem ceeb tshaj qhov kev ua tau zoo ntawm cov khoom. Thiab nws yuav tsum yog raws nraim qhov opposite.
Yuav ua li cas thov ib tug cream
SPF cream yuav tsum rov qab siv dua txhua ob teev.
Xav txog qhov sib xws ntawm cov khoom. Creams yog qhov zoo tshaj plaws rau cov tawv nqaij qhuav ntawm lub cev thiab lub ntsej muag. Gels yog qhov zoo rau cov plaub hau, piv txwv li, txiv neej lub mis, nrog rau cov tswv ntawm cov tawv nqaij oily. Lotions zoo siv nyob ib ncig ntawm lub qhov muag. Cov tshuaj tsuag yog tsim los muab kev tiv thaiv tus menyuam ntawm lub taub hau mus rau ntiv taw.
Siv tshuaj pleev thaiv hnub tom qab moisturizer lossis nourishing cream, tab sis ua ntej foundation. Ntxiv mus, tom qab siv SPF, nws tsim nyog tos ob peb feeb kom nqus tau zoo ua ntej thov pleev.
Tsis txhob hnov qab txog tej yam ntawm lub cev xws li caj dab, tes, décolleté, daim di ncauj, pob ntseg - lawv feem ntau raug rau hluav taws xob ultraviolet.
Txhua zaus koj tawm hauv hiav txwv, rov ua cov nplaum nplaum, txawm tias koj smeared nrog nws ob peb feeb ua ntej koj mus da dej.
Siv cov hmoov ntxhia, nws cov tshuaj inorganic yog ib hom UV lim. Titanium thiab zinc dioxide, uas ib txwm muaj nyob rau hauv cov dej ntxhia, muaj cov duab zoo heev. Feem ntau cov tshuaj pleev ib ce muaj SPF 50 tiv thaiv.
Cov tshuaj pleev thaiv hnub yuav tsum tau siv tsawg kawg 20 feeb ua ntej tawm mus.