Kev ntxuav hniav dawb los yog ntxuav hniav dawb yog ib lub ntsiab lus tsis sib haum xeeb.Nws muab txoj kev ntxim nyiam los txhim kho koj lub ntsej muag.
Muaj ntau txoj hauv kev los ua kom tawv nqaij sib zog.Cov no suav nrog cov tshuaj pleev ib ce tshwj xeeb thiab kho laser.Vim nws tus nqi qis thiab kev nyab xeeb dua, ntau tus neeg xaiv cov tshuaj pleev ib ce.
Yog tias koj tab tom txiav txim siab txog cov khoom lag luam whitening, muaj qee yam uas koj yuav tsum paub ua ntej.Kab lus no piav txog qhov tseem ceeb tshaj plaws, tshwj xeeb tshaj yog cov khoom xyaw.
Cov tawv nqaij lightening yeej yog hais txog kev siv cov kev kho mob tshwj xeeb lossis tshuaj los txhim kho lossis ua kom tawv nqaij tawv.Tib neeg siv ntau cov ntsiab lus los piav txog nws, suav nrog kev ntxuav hniav dawb, ua kom pom tseeb lossis ua kom tawv nqaij.
Kev cuam tshuam ntawm tib neeg cov tawv nqaij mus rau ntau yam tuaj yeem ua rau nws dull.Kev laus, muaj kuab paug, plua plav, av, hluav taws xob ultraviolet thiab tshuaj lom neeg (nrog rau cov khoom siv hauv daim tawv nqaij) tuaj yeem ua rau daim tawv nqaij puas.
Kev noj zaub mov tsis zoo, kev xaiv txoj kev ua neej tsis zoo thiab kev ntxhov siab kuj tuaj yeem ua rau muaj kev cuam tshuam tsis zoo ntawm daim tawv nqaij.
Cov xwm txheej sib txawv no tuaj yeem ua rau muaj teeb meem ntau yam, suav nrog lub voj voog tsaus, hnub nyoog me ntsis, pob txuv nti thiab pob.
Cov neeg vam khom rau cov khoom ua kom tawv nqaij thiab kev kho mob los daws cov teeb meem no.Lawv siv lawv los txhim kho lossis kho cov tawv nqaij.
Nrog rau daim tawv nqaij lightening khoom, koj tuaj yeem phim cov tawv nqaij hyperpigmented rau cov xim ntawm cov tawv nqaij ib puag ncig.Cov chaw no suav nrog cov cim yug, moles, chloasma thiab tonsils.
Cov tawv nqaij lightening yog ib qho tshwm sim thoob ntiaj teb, txawm hais tias tau tshaj tawm tias muaj kev txaus siab ntau dua rau cov tawv nqaij lightening hauv Africa, Middle East thiab India.Los ntawm 2013, nws tau kwv yees hais tias los ntawm 2018, lub ntiaj teb no daim tawv nqaij whitening khoom lag luam yuav ncav cuag ze li ntawm 20 billion US dollars.
Cov khoom lag luam thiab cov kev kho mob tuaj yeem siv ntau txoj hauv kev los txhawb lub ntsej muag ntau dua thiab ncaj ncees.Tab sis brighteners feem ntau ua haujlwm los ntawm kev cuam tshuam nrog kev tsim cov melanin lossis los ntawm kev pab ua kom puas.
Melanin yog cov khoom tseem ceeb uas ua lub luag haujlwm hauv cov xim ntawm daim tawv nqaij.Qhov no yog hom tsaus nti polymer.Muaj ntau tus neeg uas muaj tawv nqaij tawv.
Tib neeg lub cev tsim cov xim no los ntawm kev tsim melanin.Cov kws tshawb fawb tau txheeb xyuas ob hom tshuaj tseem ceeb hauv daim tawv nqaij thiab plaub hau, uas yog: Eumelanin (dub lossis xim av) thiab pheomelanin (daj lossis liab).Hom tawv nqaij tshwj xeeb yuav txiav txim siab nws lub suab nrov.
Ntau cov brighteners ua hauj lwm los ntawm inhibiting zus tau tej cov pigments.Lawv ua qhov no los ntawm kev txo qis kev ua haujlwm ntawm qee cov enzymes uas ua rau cov txheej txheem.Qhov tseem ceeb enzyme hauv synthesis yog tyrosinase.
Koj lub cev tso siab rau L-tyrosine los ua melanin.Hauv thawj kauj ruam ntawm kev tsim melanin, tyrosinase hloov cov amino acid no rau hauv L-Dopa.Brighteners sim inhibit qhov kev qhia, ua kom lossis ua haujlwm ntawm enzymes, yog li tiv thaiv kev tsim cov pigments.
Qee lwm cov khoom xyaw hauv cov khoom siv ntxuav hniav dawb tuaj yeem pab decolorize.Lawv pab rhuav tshem cov melanin uas twb muaj lawm hauv lub cev.
Ntau tus neeg xaiv cov khoom ua kom tawv nqaij dawb vim lawv tsis txaus siab nrog kev siv tshuaj pleev ib ce kom tau ib lub suab ntawm cov tawv nqaij.Txawm hais tias lawv muaj peev xwm them taus, lawv feem ntau ntshai tsam tau txais kev kho mob laser.
Txawm li cas los xij, cov khoom lag luam uas tsom mus ua kom lub ntsej muag ncaj ncees feem ntau raug kev txom nyem los ntawm kev phem rap.Raws li cov lus ceeb toom, lawv ua rau ntau yam teeb meem uas yuav ua rau lawv tsis tsim nyog siv txhua.
Nws tau hais tias ntau yam ntawm cov khoom no muaj cov khoom xyaw uas tsis zoo.Qee zaum, lawv tau pom tias muaj cov tshuaj lom neeg uas tuaj yeem ua rau muaj teeb meem ntawm daim tawv nqaij, nrog rau mob qog noj ntshav.
Tib neeg feem ntau siv lo lus "bleaching" thaum tham txog cov teeb meem kev nyab xeeb no.Vim li no, cov tuam txhab feem ntau tsis txhob siv nws los piav txog lawv cov khoom.
Kev siv cov khoom xyaw tsis zoo nyob rau xyoo dhau los tau ua rau cov tshuaj dawb huv raug txwv hauv qee lub tebchaws.
Peb tsis nkag siab tag nrho vim li cas qee cov tuam ntxhab xaiv cov khoom muaj tshuaj lom no.Nyob rau hauv kev pom ntawm muaj kev nyab xeeb los yog ntuj lwm txoj kev.Tej zaum qhov no yuav yog vim muaj kev ntshaw kom tau nyiaj ntau dua.
Hauv qab no peb tham txog qee cov khoom xyaw txaus ntshai, thaum koj pom lawv, koj yuav tsum tam sim muab tso rau hauv cov tshuaj pleev xim dawb.Koj tseem yuav pom cov ntaub ntawv ntawm cov khoom xyaw nyab xeeb uas cov khoom zoo tshaj plaws yuav tsum muaj.
Qhov no yog cov khoom xyaw nrov heev uas cov tuam ntxhab feem ntau suav nrog hauv cov zaub mov txawv.Tam sim no, ntau thiab ntau tus neeg paub txog nws cov kev phom sij, uas tau ua rau qee lub tuam txhab siv cov lus piav qhia ntse rau qhov no, xws li mercury, mercuric ammonia lossis mercury chloride.
Mercury tau siv los ua kom tawv nqaij dawb rau ntau xyoo lawm.Thaum nws raug siv rau ntawm daim tawv nqaij, nws muaj peev xwm ua kom qeeb ntawm cov synthesis ntawm melanin, yog li nws tau qhuas heev.Txhawm rau txo tus nqi ntawm cov khoom lag luam, tus nqi qis thiab yooj yim kom tau txais.
Txij thaum ntawd los, ntau lub tebchaws / cheeb tsam (thaum ntxov li xyoo 1970 hauv Tebchaws Europe) tau txwv tsis pub siv cov khoom no los ua kom tawv nqaij.Cov tshuaj no raug txwv thiab muab cais ua cov tshuaj lom hauv Tebchaws Meskas.
Mercury tuaj yeem nyob ntawm daim tawv nqaij ntev, yog li nws tuaj yeem ua rau lwm yam teeb meem.Nws tuaj yeem ua rau daim tawv nqaij tsis zoo thiab tsis tsim qhov caws pliav.Tseem muaj cov lus ceeb toom tias nws cuam tshuam rau lub hlwb ua haujlwm thiab ua rau lub raum puas.Thaum siv los ntawm cov poj niam cev xeeb tub lossis leej niam pub niam mis, nws kuj tseem tuaj yeem ua rau mob hlwb hauv cov menyuam mos
Qhov no yog ib qho ntawm daim tawv nqaij lightening agents uas pab decolorize.Nws feem ntau pom zoo tias cov neeg uas muaj vitiligo nyiam siv cov tshuaj nplaum lossis cov tshuaj pleev xim uas muaj benzophenone.Tus kab mob no yog tus yam ntxwv ntawm lub teeb thiab tsaus nti ntawm daim tawv nqaij.Cov compound pab txo cov xim ntawm daim tawv nqaij thiab ua rau cov tawv nqaij sib npaug.
Tab sis nws yuav rhuav tshem melanocytes thiab tsim melanosomes xav tau rau melanin synthesis.Yog li ntawd, siv nws yuav ua rau mus tas li los yog irreversible discoloration.
Tsuas yog rau vitiligo, cov kws kho mob tsis pom zoo kom siv monobenzophenone nyob rau hauv lwm yam mob.Tab sis koj yuav xav tsis thoob thaum pom tias qee lub tuam txhab suav nrog nws hauv cov tshuaj pleev ib ce.Cov teeb meem uas yuav tshwm sim los ntawm kev siv cov khoom xws li cov pigmentation tsis sib xws thiab nce rhiab heev rau lub hnub.
Cov khoom sib xyaw ua kom pom ntawm daim tawv nqaij yog qhov cuam tshuam, yog li koj siv nws yuav ua rau muaj kev phom sij rau lwm tus.Nws tau hais tias thaum siv, nws tuaj yeem ua rau tsis muaj xim ntawm lwm tus tsuas yog los ntawm kev sib cuag ntawm daim tawv nqaij.
Koj puas xav tsis thoob?Tej zaum koj yuav tsis tau paub ua ntej tias cov tshuaj steroids tuaj yeem muaj nyob rau hauv cov khoom siv ntxuav hniav dawb.Tab sis lawv ua tau.
Steroids tuaj yeem pab ua kom tawv nqaij ntawm ntau txoj kev.Ib qho ntawm lawv muaj feem cuam tshuam txog yuav ua li cas lawv txo qis kev ua haujlwm ntawm melanocytes.Tab sis lawv kuj tuaj yeem txo cov tawv nqaij ntawm tes hloov pauv.
Txawm li cas los xij, nws yog qhov teeb meem tseem ceeb uas cov tshuaj tsis sib haum xeeb no tsis suav nrog hauv cov tshuaj pleev xim dawb.Eczema thiab psoriasis yog ob yam kab mob uas kws kho hniav feem ntau siv los kho.Qhov teeb meem tiag tiag yog siv mus ntev.
Steroids, suav nrog corticosteroids, tshwj xeeb yog siv los kho cov kab mob ntawm daim tawv nqaij.Daim ntawv tshuaj yuav tsum tau muab, uas txhais tau hais tias koj yuav zoo dua tsis pom lawv hauv cov tshuaj pleev ib ce.Kev siv lawv mus ntev tuaj yeem txo qhov kev puas tsuaj mus tas li rau ntawm daim tawv nqaij.
Ntau cov khoom siv kho mob ntawm daim tawv nqaij muaj cov roj ntxhia ua cov khoom xyaw.Cov chaw tsim khoom siv nws los pab moisturize ntawm daim tawv nqaij.Nws kuj tseem pheej yig dua - pheej yig dua li cov roj yam tseem ceeb.
Txawm li cas los xij, tib neeg tau txhawj xeeb txog lub peev xwm ntawm cov khoom xyaw no ua rau muaj teeb meem ntawm daim tawv nqaij.Cov roj ntxhia tuaj yeem txhaws koj cov pores ntawm daim tawv nqaij, ua rau nws nyuaj rau tshem tawm cov teeb meem.Yog li ntawd, koj yuav ntsib teeb meem xws li pob txuv thiab pob txuv.Ua kom qhov teeb meem loj dua, cov khoom xyaw xav tias yog carcinogenic.
Koj yeej yuav tsum tsis txhob tau txais txiaj ntsig ntawm daim tawv nqaij lightening los ntawm qhov no.Parabens yog ib pawg ntawm preservatives.Cov neeg tsim khoom feem ntau siv lawv los txuas ntxiv lub txee lub neej ntawm cov tshuaj pleev ib ce.
Cov teeb meem uas cov khoom xyaw no tuaj yeem ua rau muaj kev cuam tshuam rau koj cov kab mob endocrine thiab cov kab mob hauv lub cev.Nws kuj tau pom tias yuav ua rau muaj kev pheej hmoo ntawm mob qog noj ntshav.
Ntawm no, koj muaj cov khoom xyaw nrov heev hauv cov khoom tu tawv nqaij.Hydroquinone yog ib yam tshuaj uas inhibits melanin synthesis los ntawm thaiv tyrosinase.Qhov no zoo heev.Yog li ntawd, nws yog feem ntau pom nyob rau hauv ntau whitening cream.
Qhov no tsis txaus ntshai li lwm cov khoom xyaw uas tsis zoo.Qhov no yog vim tias cov kws tshaj lij qee zaum pom zoo, tshwj xeeb tshaj yog 2% (lossis qis dua) cov ntsiab lus.Tab sis yuav ua li cas koj txiav txim siab lub zog ntawm ib qho ntawm cov tshuaj pleev xim dawb, tshwj xeeb tshaj yog tias nws tsis tau teev tseg?
Ntxiv rau qhov muaj zog, kev siv ntev ntev ntawm hydroquinone kuj ua rau muaj kev pheej hmoo ntawm kev phiv.Nws tuaj yeem ua rau tawv nqaij tsis zoo, qhov twg nws tuaj yeem mus tas li.Qhov no kuj tseem tuaj yeem cuam tshuam rau qee cov enzymes uas ua lub luag haujlwm tseem ceeb hauv tib neeg lub cev.
Cawv, dioxane thiab phthalates yog lwm cov khoom xyaw uas tsim kev puas tsuaj uas koj yuav tsum tau them sai sai rau hauv koj cov tawv nqaij lightening cream los tiv thaiv qhov chaw tsaus.
Thaum tham txog tej yam ntuj tso, kev nyab xeeb ntawm daim tawv nqaij lightening agents, daim ntawv yuav ua tsis tiav yog hais tias nws tsis muaj xws li extracts ntawm citrus txiv hmab txiv ntoo (xws li txiv kab ntxwv thiab txiv qaub).Cov no yog cov txiaj ntsig, feem ntau yog vim lawv cov ntsiab lus vitamin C.Nws yog ntseeg hais tias cov compound muaj cov tawv nqaij whitening zog.
Txawm li cas los xij, nws yog ntau dua uas tib neeg tham txog vitamin C ntau dua los ntawm qhov kev xav ntawm cov txiaj ntsig ntawm daim tawv nqaij.Cov tshuaj muaj antioxidant zog thiab tuaj yeem pab tiv thaiv cov cim ntawm kev laus, xws li cov kab zoo thiab wrinkles.
Citrus extract tseem ntseeg tau tias yuav pab txhawb kev tsim cov collagen, uas yog qhov zais cia tom qab khov kho, cov tawv nqaij hluas.Lawv tuaj yeem txhim kho kev ntxhib los mos ntawm daim tawv nqaij thiab txhawb kev loj hlob ntawm cov hlwb tshiab.
Cov khoom xyaw no tseem hu ua vitamin B3 thiab feem ntau pom muaj nyob rau hauv cov khoom siv tawv nqaij zoo.Ib qho laj thawj rau qhov no yog nws cov tawv nqaij lightening nyhuv.Nws pab txo qhov tsim ntawm melanin.
Nicotinamide ua rau cov tshuaj tua kab mob antioxidant thiab muaj cov tshuaj tiv thaiv kab mob.Koj yuav pom tias nws khaws cov dej noo thiab pab ua kom tawv nqaij du thiab muag.Vitamins kuj pab tswj cov oiliness ntawm daim tawv nqaij.
Thaum siv nrog N-acetylglucosamine, kev ua tau zoo ntawm cov vitamin no ntseeg tau tias yuav txhim kho.
Tej zaum koj yuav tau hnov tias qee cov neeg xav kom siv cov txiv hmab txiv ntoo (xws li mulberry, bearberry lossis blueberry) los ua kom koj cov tawv nqaij.Qhov no yog vim muaj cov tshuaj hu ua arbutin, tseem hu ua hydroquinone-β-D-glucoside.
Arbutin pab txo qis melanin hauv lub cev.Nws muaj ob isomers: α thiab β.Lub alpha isomer ruaj khov dua thiab haum rau cov tawv nqaij lightening.
Cov khoom xyaw ntuj no suav hais tias yog lwm txoj hauv kev nyab xeeb rau cov decolorants nrov hauv ntau cov khoom.Thaum tyrosinase yuav tsum tau inhibited, daim ntawv ntshiab yog qhov zoo tshaj plaws.
Tsis yog txhua yam nrog lo lus "acid" yog teeb meem.Ntau yam ntawm no yog ntuj thiab muaj txiaj ntsig.Yog li tsis txhob ntshai.
Azelaic acid yog ib feem ntawm barley thiab lwm yam nplej, thiab feem ntau yog siv los kho pob txuv thiab rosacea.Nws pH yog hais txog tib yam li daim tawv nqaij, yog li nws muaj kev nyab xeeb heev.
Cov kws tshawb fawb tau pom tias cov khoom xyaw no tuaj yeem pab ua kom tawv nqaij dawb.Cov kev tshawb fawb tau pom tias nws yog ib txoj hauv kev zoo los kho cov tawv nqaij hloov xim.Nws tuaj yeem pab tiv thaiv kev tsim cov melanin.
Qhov tripeptide molecule no yog cov khoom siv los tiv thaiv kev laus uas tiv thaiv daim tawv nqaij los ntawm kev puas tsuaj oxidative.Cov tawv nqaij lightening tsuas yog ib qho ntawm ntau cov txiaj ntsig cuam tshuam nrog nws.
Glutathione kuj muaj peev xwm tiv thaiv lub hnub puas tsuaj.Whitening ntawm daim tawv nqaij feem ntau txo koj lub hnub tiv thaiv lub peev xwm.Tab sis cov khoom xyaw no muaj cov khoom tiv thaiv oxidant thiab tuaj yeem tiv thaiv koj ntawm UV rays.
Txawm li cas los xij, cov kws tshaj lij hais tias cov molecule muaj qhov nqus tau qis thaum siv hauv zos.Ib txoj hauv kev los daws qhov teeb meem no yog siv nws ua ke nrog lwm cov tshuaj (xws li vitamin C).
Raws li peb txhua tus paub, Suav siv nws rau ntau hom tawv nqaij mob.Cov kev tshawb fawb tau pom tias cov extracts los ntawm cov nroj tsuag licorice, tshwj xeeb tshaj yog galapudine, muaj peev xwm ua kom tawv nqaij.
Cov khoom no ntseeg tau tias yuav ua kom tawv nqaij ntawm ntau yam.Tab sis lawv feem ntau ua haujlwm los ntawm inhibiting cov haujlwm ntawm tyrosinase-tej zaum mus txog 50%.
Cov kev tshawb fawb tau pom tias vim nws tuaj yeem cuam tshuam cov synthesis ntawm melanin, nws tuaj yeem ua kom tawv nqaij zoo.Nws ua qhov no los ntawm kev thaiv cov haujlwm ntawm tyrosinase.
Crystal hmoov yog ib yam khoom los ntawm malted nplej fermentation, uas yog heev haum rau puas thiab rhiab tawv nqaij.Nws yog feem ntau tau thaum lub sij hawm zus tau tej cov Japanese mov wine.Nws tau hais tias cov neeg Nyij Pooj tau siv sijhawm ntev los kho cov tawv nqaij tawv.
Koj yuav tsum nco ntsoov tias nws txawv ntawm kojic acid dipalmitate ruaj khov dua los ntawm qee lub tuam txhab.Txawm hais tias lwm cov khoom xyaw kuj yuav pab tau, nws tsis zoo li kojic acid.
Qhov no yog ib qho ntawm ob qho alpha hydroxy acids (AHA) uas tau kawm ntau tshaj-lwm tus yog lactic acid.Vim lawv qhov loj me me, lawv tau txais txiaj ntsig zoo rau lawv lub peev xwm nkag mus rau sab saum toj txheej ntawm daim tawv nqaij.
Ntau tus neeg paub tias glycolic acid yog exfoliant.Nws pab txhim kho kev muaj peev xwm rov ua dua tshiab ntawm tes thiab tshem tawm cov kab mob tsis zoo lossis cov tawv nqaij tuag.Tab sis qhov no yog ntau tshaj qhov ntawd.
Nrog rau cov khoom xyaw no, koj tuaj yeem muaj cov tawv nqaij ci dua.Cov kev tshawb fawb tau pom tias nws tuaj yeem pab koj txo qis melanin hauv koj lub cev, yog li txhawb cov tawv nqaij.
Txawm hais tias kev ntxuav hniav dawb los yog tshuaj dawb tuaj yeem yog lub ntsiab lus tsis sib haum xeeb, tsis yog txhua tus tuaj yeem them taus.Cov neeg uas muaj teeb meem ntawm daim tawv nqaij (xws li lub hnub nyoog me ntsis, me ntsis, tsaus voj voog thiab plaques) yeej yuav tsis raug hem los ntawm cov lus ceeb toom phem txog qhov teeb meem no.
Qhov tseeb yog tias tib neeg feem ntau tsis pom zoo ntawm daim tawv nqaij dawb vim muaj peev xwm ua rau muaj kev phom sij.Cov lus piav qhia tseem ceeb rau hom teeb meem no yog cov chaw tsim khoom siv cov khoom xyaw txaus ntshai, tejzaum nws yuav tau nyiaj.Raws li cov neeg siv khoom paub ntau ntxiv, qhov teeb meem tsis zoo tam sim no hloov pauv.
Raws li koj tuaj yeem pom saum toj no, muaj kev nyab xeeb, cov khoom xyaw ntuj uas tuaj yeem ua rau koj lub ntsej muag ci dua thiab noj qab nyob zoo.Koj tsuas yog yuav tsum nrhiav cov khoom no ntawm cov khoom koj npaj yuav.Ua ntej yuav, thov tshawb fawb txog lwm cov khoom xyaw uas peb tsis tau hais ntawm no.
Cov ncuav qab zib tsim nyog yog qhov tseem ceeb rau kev ua haujlwm ib txwm ntawm lub vev xaib.Pawg no tsuas muaj cov ncuav qab zib uas ua kom cov haujlwm yooj yim thiab kev nyab xeeb ntawm lub vev xaib.Cov ncuav qab zib no tsis khaws cov ntaub ntawv tus kheej.
Post lub sij hawm: Sep-22-2020