Vitamin C ine mhedzisiro yekudzivirira nekurapa ascorbic acid, saka inozivikanwawo seascorbic asidhiuye ivhitamini inonyungudika mumvura. Natural vhitamini C inonyanya kuwanikwa michero itsva (maapuro, maranjisi, kiwifruit, etc.) uye miriwo (matomatisi, makomkomere, uye makabheji, etc.). Nekuda kwekushaikwa kweiyo enzyme yakakosha mudanho rekupedzisira revhitamini C biosynthesis mumuviri wemunhu, kureva.L-glucuronic acid 1,4-lactone oxidase (GLO),vhitamini C inofanira kutorwa kubva mukudya.
Iyo molecular formula yevhitamini C ndeye C6H8O6, inova yakasimba kuderedza mumiriri. Mapoka maviri anol hydroxyl ari pa2 uye 3 maatomu ekabhoni ari mumorekuru anoparadzaniswa nyore nyore uye anosunungura H +, nokudaro oxidizing kuumba dehydrogenated vhitamini C. Vitamin C uye dehydrogenated vhitamini C inoumba reversible redox system, inoshandisa zvakasiyana-siyana antioxidant nemamwe mabasa, uye kuita basa rinokosha mumuviri wemunhu. Kana yaiswa kumunda wezvizoro, vhitamini C ine mabasa akadai sekuchena uye kusimudzira collagen kuumbwa.
Kushanda kwevhitamini C
kuchena kweganda
Pane nzira mbiri huru dzinoshandiswa nadzovitamini Cine whitening effect paganda. Nzira yekutanga ndeyekuti vhitamini C inogona kuderedza yakasviba okisijeni melanin panguva yekugadzirwa kwe melanin kudzikisa melanin. Rudzi rwe melanin runotarwa neiyo quinone chimiro mu melanin molecule, uye vhitamini C ine pfuma yeinoderedza mumiriri, iyo inogona kuderedza chimiro chequinone kuita phenolic chimiro. Chechipiri nzira ndeyekuti vhitamini C inogona kutora chikamu mune metabolism ye tyrosine mumuviri, nekudaro ichidzikisa shanduko yetyrosine kuita melanin.
antioxidant
Mahara radicals zvinhu zvinokuvadza zvinogadzirwa nemaitiro emuviri, ane akasimba oxidizing zvimiro uye anogona kukuvadza tishu nemaseru, zvichitungamira kune akatevedzana ezvirwere zvisingaperi.Vitamin Cis a water-soluble free radical scavenger inogona kubvisa mahara radicals akadai - OH, R -, uye O2- mumuviri, ichiita basa rakakosha mukuita antioxidant.
Kurudzira collagen synthesis
Kune mabhuku anoratidza kuti zuva nezuva kushandiswa kwepamusoro kwemaitiro ane 5% L-ascorbic acid muganda kunogona kuwedzera mRNA maratidziro emhando I uye mhando III collagen paganda, uye mRNA maratidziro emhando nhatu dzeinvertase, carboxycollagenase. , aminoprocollagenase, uye lysine oxidase inowedzerawo kusvika pamwero wakafanana, zvichiratidza kuti vhitamini C inogona kukurudzira kuumbwa kwe collagen muganda.
Prooxidation effect
Kuwedzera kune antioxidant mhedzisiro, vhitamini C zvakare ine prooxidant mhedzisiro pamberi pesimbi ions, uye inogona kukonzera lipid, protein oxidation, uye DNA kukuvadzwa, nekudaro kukanganisa gene kutaura. Vitamin C inogona kuderedza peroxide (H2O2) ku hydroxyl radical uye kukurudzira kuumbwa kwekukuvara kweoxidative nekuderedza Fe3 + kusvika Fe2 + uye Cu2 + kuCu +. Naizvozvo, hazvikurudzirwe kuwedzera vhitamini C kune vanhu vane iron yakakwira kana avo vane pathological mamiriro ane chekuita nekuremerwa kwesimbi senge thalassemia kana hemochromatosis.
Nguva yekutumira: Kubvumbi-10-2023
