Magnesium Ascorbyl Phosphate / Ascorbyl Tetraisopalmitate rau kev siv tshuaj pleev ib ce

Vitamin C muaj cov txiaj ntsig ntawm kev tiv thaiv thiab kho ascorbic acid, yog li nws tseem hu uaascorbic acidthiab yog dej-soluble vitamin. Ntuj vitamin C feem ntau pom muaj nyob rau hauv cov txiv hmab txiv ntoo tshiab (apples, txiv kab ntxwv, kiwifruit, thiab lwm yam) thiab zaub (txiv lws suav, dib, thiab zaub qhwv, thiab lwm yam). Vim tsis muaj cov enzyme tseem ceeb hauv cov kauj ruam kawg ntawm vitamin C biosynthesis hauv tib neeg lub cev, uas yogL-glucuronic acid 1,4-lactone oxidase (GLO),vitamin C yuav tsum tau noj los ntawm cov khoom noj.

Cov mis molecular ntawm vitamin C yog C6H8O6, uas yog ib tug muaj zog txo tus neeg sawv cev. Ob pawg enol hydroxyl ntawm 2 thiab 3 carbon atoms hauv cov molecule tau yooj yim dissociated thiab tso H +, yog li oxidizing los tsim dehydrogenated vitamin C. Vitamin C thiab dehydrogenated vitamin C tsim ib tug reversible redox system, exerting ntau yam antioxidant thiab lwm yam dej num, thiab ua lub luag haujlwm tseem ceeb hauv tib neeg lub cev. Thaum siv rau thaj tsam ntawm cov tshuaj pleev ib ce, vitamin C muaj zog xws li ntxuav hniav dawb thiab txhawb kev tsim collagen.

Kev ua tau zoo ntawm vitamin C

tawv nqaij dawb

Muaj ob lub ntsiab mechanisms uasvitamin Cmuaj cov nyhuv whitening ntawm daim tawv nqaij. Thawj lub tswv yim yog tias vitamin C tuaj yeem txo qis cov pa oxygen melanin thaum lub sijhawm tsim cov tshuaj melanin kom txo melanin. Cov xim ntawm melanin yog txiav txim siab los ntawm cov qauv quinone nyob rau hauv melanin molecule, thiab vitamin C muaj cov cuab yeej ntawm tus neeg sawv cev txo, uas tuaj yeem txo cov quinone qauv rau cov qauv phenolic. Qhov thib ob txheej txheem yog tias vitamin C tuaj yeem koom nrog hauv cov metabolism ntawm tyrosine hauv lub cev, yog li txo qis kev hloov pauv ntawm tyrosine rau hauv melanin.

antioxidant

Dawb radicals yog cov khoom tsis zoo uas tsim los ntawm lub cev cov tshuaj tiv thaiv, uas muaj zog oxidizing zog thiab tuaj yeem ua rau cov ntaub so ntswg thiab hlwb puas, ua rau muaj cov kab mob ntev.Vitamin Cyog cov dej-soluble dawb radical scavenger uas tuaj yeem tshem tawm cov dawb radicals xws li - OH, R - thiab O2- hauv lub cev, ua lub luag haujlwm tseem ceeb hauv kev ua haujlwm antioxidant.

Txhawb collagen synthesis

Muaj cov ntaub ntawv qhia tias niaj hnub tshuaj pleev ib ce ntawm formulations muaj 5% L-ascorbic acid nyob rau hauv daim tawv nqaij yuav ua rau kom cov mRNA qhia theem ntawm hom I thiab hom III collagen nyob rau hauv daim tawv nqaij, thiab cov mRNA qhia theem ntawm peb hom invertases, carboxycollagenase. , aminoprocollagenase, thiab lysine oxidase kuj nce mus rau qhov zoo sib xws, qhia tias vitamin C tuaj yeem txhawb kev sib txuas ntawm collagen hauv daim tawv nqaij.

Prooxidation nyhuv

Ntxiv nrog rau cov teebmeem antioxidant, vitamin C kuj muaj cov nyhuv prooxidant nyob rau hauv muaj cov hlau ions, thiab tuaj yeem ua rau lipid, protein oxidation, thiab DNA puas, yog li cuam tshuam rau cov noob caj noob ces. Vitamin C tuaj yeem txo cov peroxide (H2O2) rau hydroxyl radical thiab txhawb kev tsim cov oxidative puas tsuaj los ntawm kev txo Fe3 + rau Fe2 + thiab Cu2 + rau Cu +. Yog li, nws tsis pom zoo kom ntxiv cov vitamin C rau cov neeg uas muaj cov ntsiab lus hlau siab lossis cov neeg uas muaj cov kab mob pathological cuam tshuam nrog cov hlau overload xws li thalassemia lossis hemochromatosis.