Hauv kev lag luam kev zoo nkauj thiab kev tu tawv nqaij, muaj ib lub ntsiab lus uas txhua tus ntxhais nyiam, thiab yog vitamin C.
Whitening, freckle tshem tawm, thiab kev zoo nkauj ntawm daim tawv nqaij yog tag nrho cov teebmeem ntawm vitamin C.
1, Cov txiaj ntsig zoo nkauj ntawm vitamin C:
1) Antioxidant
Thaum cov tawv nqaij raug txhawb los ntawm lub hnub raug (ultraviolet hluav taws xob) los yog ib puag ncig muaj kuab paug, ntau cov dawb radicals yog generated. Cov tawv nqaij tso siab rau cov txheej txheem nyuaj ntawm enzyme thiab tsis yog enzyme antioxidants los tiv thaiv nws tus kheej los ntawm kev puas tsuaj dawb radical.
VC yog cov antioxidant ntau tshaj plaws hauv tib neeg cov tawv nqaij, siv nws cov oxidizable heev los hloov lwm yam tshuaj thiab tiv thaiv lawv los ntawm oxidation. Hauv lwm lo lus, VC txi nws tus kheej los ua kom tsis muaj zog thiab tshem tawm cov dawb radicals, yog li tiv thaiv daim tawv nqaij.
2) inhibit melanin ntau lawm
VC thiab nws cov derivatives tuaj yeem cuam tshuam nrog tyrosinase, txo qhov hloov pauv ntawm tyrosinase, thiab txo melanin ntau lawm. Ntxiv nrog rau inhibiting tyrosinase, VC kuj tseem tuaj yeem ua tus neeg sawv cev txo melanin thiab cov khoom nruab nrab ntawm melanin synthesis, dopaquinone, txo cov xim dub kom tsis muaj xim thiab ua tiav cov nyhuv whitening. Vitamin C yog ib qho kev nyab xeeb thiab zoo ntawm daim tawv nqaij dawb.
3) Cov tshuaj pleev thaiv hnub ntawm daim tawv nqaij
VC koom nrog hauv kev sib txuas ntawm collagen thiab mucopolysaccharides, txhawb kev kho qhov txhab, tiv thaiv tshav ntuj, thiab zam cov sequelae sab laug los ntawm tshav ntuj ntau dhau. Nyob rau tib lub sijhawm, vitamin C muaj cov txiaj ntsig zoo antioxidant thiab tuaj yeem ntes thiab tshem tawm cov dawb radicals hauv daim tawv nqaij, tiv thaiv kev puas tsuaj los ntawm ultraviolet rays. Yog li, vitamin C hu ua "intradermal sunscreen". Txawm hais tias nws tsis tuaj yeem nqus los yog thaiv cov kab hluav taws xob ultraviolet, nws tuaj yeem tsim cov txiaj ntsig tiv thaiv kev puas tsuaj ultraviolet hauv lub dermis. Lub hnub tiv thaiv nyhuv ntawm kev ntxiv VC yog scientifically raws li ~
4) Txhawb collagen synthesis
Kev poob ntawm collagen thiab elastin tuaj yeem ua rau peb cov tawv nqaij tsis tshua muaj elasticity thiab muaj kev laus phenomena xws li cov kab zoo.
Qhov sib txawv tseem ceeb ntawm collagen thiab cov protein tsis tu ncua yog tias nws muaj hydroxyproline thiab hydroxylysine. Lub synthesis ntawm ob amino acids yuav tsum muaj kev koom tes ntawm vitamin C.
Lub hydroxylation ntawm proline thaum lub sij hawm synthesis ntawm collagen yuav tsum muaj kev koom tes ntawm vitamin C, yog li vitamin C tsis muaj peev xwm tiv thaiv lub cev synthesis ntawm collagen, ua rau cellular connectivity mob.
5) Kho cov teeb meem puas tsuaj los txhawb kev kho qhov txhab
Vitamin C tuaj yeem txhawb kev sib txawv ntawm keratinocytes, txhawb kev ua haujlwm ntawm cov kab mob epidermal, thiab pab tsim cov txheej txheem epidermal. Yog li vitamin C muaj txiaj ntsig zoo rau ntawm daim tawv nqaij.
Qhov no kuj yog vim li cas ib qho ntawm cov tsos mob ntawm qhov tsis muaj cov khoom noj no yog qhov mob tsis zoo.
6) Anti-inflammatory
Vitamin C kuj muaj cov tshuaj tua kab mob zoo heev thiab tiv thaiv kab mob, uas tuaj yeem txo cov kev ua haujlwm ntawm ntau yam cytokines. Yog li ntawd, vitamin C feem ntau siv los ntawm cov kws kho mob dermatologist los kho cov kab mob ntawm daim tawv nqaij xws li pob txuv.
2, Dab tsi yog qhov sib txawv ntawm cov vitamin C?
Cov vitamin C ntshiab yog hu ua L-ascorbic acid (L-AA). Qhov no yog cov tshuaj lom neeg lom zem tshaj plaws thiab tau kawm ntau daim ntawv ntawm vitamin C. Txawm li cas los xij, daim ntawv no sai oxidizes thiab ua tsis muaj zog nyob rau hauv huab cua, tshav kub, lub teeb, los yog huab cua pH. Cov kws tshawb fawb tau ruaj khov L-AA los ntawm kev sib txuas nrog cov vitamin E thiab ferulic acid rau siv hauv tshuaj pleev ib ce. Muaj ntau ntau lwm cov qauv rau vitamin C, suav nrog 3-0 ethyl ascorbic acid, ascorbate glucoside, magnesium thiab sodium ascorbate phosphate, tetrahexyl decanol ascorbate, ascorbate tetraisopropylpalmitate, thiab ascorbate palmitate. Cov derivatives no tsis yog cov vitamin C ntshiab, tab sis tau hloov kho kom ruaj khov thiab ua siab ntev ntawm ascorbic acid molecules. Hais txog kev ua tau zoo, ntau ntawm cov qauv no muaj cov ntaub ntawv tsis sib haum xeeb lossis xav tau kev tshawb fawb ntxiv txhawm rau txheeb xyuas lawv cov txiaj ntsig. L-ascorbic acid, tetrahexyl decanol ascorbate, thiab ascorbate tetraisopalmitate stabilized nrog vitamin E thiab ferulic acid muaj cov ntaub ntawv feem ntau txhawb nqa lawv siv.
Post lub sij hawm: Nov-25-2024