Vithamine C e na le phello ea ho thibela le ho phekola ascorbic acid, ka hona e boetse e tsejoa e leascorbic acidhape ke vithamine e qhibilihang ka metsing. Vithamine C ea tlhaho e fumanoa haholo litholoana tse ncha (liapole, lilamunu, kiwifruit, joalo-joalo) le meroho (tamati, likomkomere le k'habeche, joalo-joalo). Ka lebaka la khaello ea enzyme ea bohlokoa mohatong oa ho qetela oa biosynthesis ea vithamine C 'meleng oa motho, e leng.L-glucuronic acid 1,4-lactone oxidase (GLO),vithamine C e tlameha ho nkoa lijong.
Foromo ea molek'hule ea vithamine C ke C6H8O6, e leng ntho e matla e fokotsang. Lihlopha tse peli tsa enol hydroxyl tse holim'a liathomo tsa carbon tsa 2 le 3 ka molek'hule li aroha habonolo 'me li lokolla H +, kahoo li oxidizing ho theha vithamine C e nang le dehydrogenated. Vithamine C le dehydrogenated vithamine C li theha tsamaiso ea redox e khutlisetsoang morao, e sebetsang ka mefuta e sa tšoaneng ea antioxidant le mesebetsi e meng. ho bapala karolo ya bohlokwa mmeleng wa motho. Ha e sebelisoa tšimong ea litlolo, vithamine C e na le mesebetsi e kang ho soeufala le ho khothalletsa ho thehoa ha collagen.
Ho sebetsa ha vithamine C
ho soeufala ha letlalo
Ho na le mekhoa e 'meli e meholo eo ka eonavithamine Ce na le phello e tšoeu letlalong. Mokhoa oa pele ke hore vithamine C e ka fokotsa melanin e lefifi ea oksijene nakong ea tlhahiso ea melanin ho fokotsa melanin. 'Mala oa melanin o khethoa ke sebopeho sa quinone molek'hule ea melanin,' me vithamine C e na le thepa ea ho fokotsa, e ka fokotsang sebopeho sa quinone ho sebopeho sa phenolic. Mokhoa oa bobeli ke hore vithamine C e ka kenya letsoho metabolism ea tyrosine 'meleng, kahoo e fokotsa phetoho ea tyrosine ho melanin.
antioxidant
Li-radicals tsa mahala ke lintho tse kotsi tse hlahisoang ke liketso tsa 'mele, tse nang le thepa e matla ea oxidizing' me li ka senya lisele le lisele, tse lebisang ho letoto la mafu a sa foleng.Vithamine Cke metsi a qhibilihang mahala a radical scavenger a ka felisang li-radicals tsa mahala joalo ka - OH, R -, le O2- 'meleng, e bapala karolo ea bohlokoa ts'ebetsong ea antioxidant.
Khothalletsa tlhahiso ea collagen
Ho na le lingoliloeng tse bonts'ang hore ts'ebeliso ea letsatsi le letsatsi ea litlolo tse nang le 5% L-ascorbic acid letlalong li ka eketsa maemo a polelo ea mRNA ea mofuta oa I le mofuta oa III oa collagen letlalong, le maemo a polelo ea mRNA ea mefuta e meraro ea invertase, carboxycollagenase. , aminoprocollagenase, le lysine oxidase le tsona li eketseha ka tsela e tšoanang, e leng se bontšang hore vithamine C e ka khothalletsa tlhahiso ea collagen letlalong.
Phello ea prooxidation
Ntle le litlamorao tsa antioxidant, vithamine C e boetse e na le phello ea prooxidant boteng ba li-ion tsa tšepe, 'me e ka baka lipid, protheine oxidation le tšenyo ea DNA, ka hona e ama liphatsa tsa lefutso. Vithamine C e ka fokotsa peroxide (H2O2) ho hydroxyl radical le ho khothalletsa ho thehoa ha tšenyo ea oxidative ka ho fokotsa Fe3 + ho Fe2 + le Cu2 + ho Cu +. Ka hona, ha ho khothalletsoe ho tlatselletsa vithamine C bakeng sa batho ba nang le tšepe e ngata kapa ba nang le maemo a pathological a amanang le tšepe e ngata joalo ka thalassemia kapa hemochromatosis.
Nako ea poso: Apr-10-2023
