IVithamin C kwiimveliso zokhathalelo lwesikhumba: kutheni ithandwa kangaka?

1, Iinzuzo zobuhle bevithamin C:
1) I-Antioxidant
Xa ulusu lukhuthazwa kukukhanya kwelanga (imitha ye-ultraviolet) okanye ukungcola kokusingqongileyo, ubuninzi bee-radicals zamahhala ziveliswa. Ulusu luxhomekeke kwinkqubo entsonkothileyo ye-enzyme kunye ne-non-enzyme antioxidants ukuzikhusela kumonakalo omkhulu wasimahla.
I-VC yeyona nto ininzi ye-antioxidant eluswini lomntu, isebenzisa ubume bayo obuxutywe kakhulu ne-oxidizable ukuthatha indawo yezinye izinto kwaye izikhusele kwi-oxidation. Ngamanye amazwi, i-VC iyazincama ukuze inciphise kwaye isuse ii-radicals zamahhala, ngaloo ndlela ikhusela ulusu.

2) Ukuthintela ukuveliswa kwe-melanin
I-VC kunye ne-derivatives yayo inokuphazamisa i-tyrosinase, ukunciphisa izinga lokuguqulwa kwe-tyrosinase, kunye nokunciphisa imveliso ye-melanin. Ukongeza ekuvimbeleni i-tyrosinase, i-VC inokusebenza njenge-arhente yokunciphisa i-melanin kunye nemveliso ephakathi ye-melanin synthesis, i-dopaquinone, ukunciphisa umnyama ongenambala kunye nokufezekisa iziphumo ezimhlophe. I-Vitamin C yi-ejenti ekhuselekileyo kunye nesebenzayo yokucoca ulusu.

3) I-sunscreen yesikhumba

I-VC ithatha inxaxheba kwi-synthesis ye-collagen kunye ne-mucopolysaccharides, ikhuthaza ukuphulukiswa kwesilonda, ikhusela ukutshiswa kwelanga, kwaye igweme i-sequelae eshiywe kukukhanya kwelanga ngokugqithiseleyo. Kwangaxeshanye, ivithamin C ineepropathi ezigqwesileyo zokulwa ne-antioxidant kwaye inokubamba kunye nokunciphisa i-radicals yamahhala eluswini, ikhusela umonakalo kwimitha ye-ultraviolet. Ngoko ke, i-vitamin C ibizwa ngokuba "yi-intradermal sunscreen". Nangona ingenako ukufunxa okanye ukuvimba imisebe ye-ultraviolet, inokuvelisa umphumo wokukhusela kumonakalo we-ultraviolet kwidermis. Impembelelo yokukhusela ilanga yokongeza i-VC isekelwe ngokwesayensi ~

4) Ukukhuthaza i-collagen synthesis

Ukulahlekelwa yi-collagen kunye ne-elastin kunokubangela ukuba ulusu lwethu lube luncinci kwaye lube namava okuguga okufana nemigca emihle.

Umahluko omkhulu phakathi kwe-collagen kunye neprotheni eqhelekileyo kukuba iqulethe i-hydroxyproline kunye ne-hydroxylysine. Ukwenziwa kwezi ziasidi zimbini ze-amino kufuna ukubandakanyeka kwevithamin C.
I-hydroxylation ye-proline ngexesha lokwenziwa kwe-collagen idinga ukuthatha inxaxheba kwe-vitamin C, ngoko ke ukungabikho kwe-vitamin C kuthintela ukuhlanganiswa okuqhelekileyo kwe-collagen, okukhokelela ekuphazamisekeni koqhagamshelwano lweselula.

5) Ukulungisa izithintelo ezonakalisiweyo ukukhuthaza ukuphulukiswa kwesilonda

I-Vitamin C inokukhuthaza ukuhlukana kweekeratinocytes, ukuvuselela umsebenzi we-epidermal barrier, kunye nokunceda ukuvuselela i-epidermal layer. Ngoko i-vitamin C inefuthe elihle kakhulu kwisithintelo solusu.

Yiyo loo nto ke enye yeempawu zokuswela esi sondlo kukuphola kakubi kwenxeba.

6) Anti inflammatory

I-Vitamin C ineempembelelo ezintle kakhulu zokulwa ne-antibacterial kunye ne-anti-inflammatory, ezinokunciphisa umsebenzi we-transcription factor ye-cytokines ezahlukeneyo ezivuthayo. Ngoko ke, i-vitamin C idla ngokusetyenziswa ngabadermatologists ukunyanga izifo zesikhumba ezivuthayo ezifana ne-acne.

2,Zeziphi iintlobo ezahlukeneyo zevithamin C?
I-vitamin C ecocekileyo ibizwa ngokuba yi-L-ascorbic acid (L-AA). Olu lolona hlobo lwe-biologically olusebenzayo kunye nolufundisiweyo olubanzi lwevithamin C. Nangona kunjalo, le fomu i-oxidizes ngokukhawuleza kwaye ingasebenzi phantsi komoya, ubushushu, ukukhanya, okanye iimeko ezigqithisileyo ze-pH. Iingcali zenzululwazi zizinzile i-L-AA ngokuyidibanisa ne-vitamin E kunye ne-ferulic acid ukuze isetyenziswe kwizinto zokuthambisa. Kukho ezinye iifomyula ezininzi ze-vitamin C, kuquka i-3-0 ethyl ascorbic acid, i-ascorbate glucoside, i-magnesium kunye ne-sodium ascorbate phosphate, i-tetrahexyl decanol ascorbate, i-ascorbate tetraisopropylpalmitate, kunye ne-ascorbate palmitate. Ezi zinto ziphumayo azikho i-vitamin C ecocekileyo, kodwa zitshintshiwe ukuze kuphuculwe uzinzo kunye nokunyamezela kwe-ascorbic acid molecules. Ngokumalunga nokusebenza kakuhle, uninzi lwezi fomula zineenkcukacha eziphikisanayo okanye zifuna uphando olongezelelweyo ukuqinisekisa ukusebenza kwazo. I-L-ascorbic acid, i-tetrahexyl decanol ascorbate, kunye ne-ascorbate tetraisopalmitate ezinzile kunye ne-vitamin E kunye ne-ferulic acid zineedatha ezininzi ezixhasa ukusetyenziswa kwazo.