Vitamini A michina, kusanganisira retinol uye Retin-A, yave ichinzi "yegoridhe yepamusoro" yekusagadzikana kweganda rekuchengetedza ganda, kubatsira ruvara rako kutarisa ruduku uye runotarisa. Asi izvi zvakagadzirwa sei, uye zvinobudirira zvakadini pakurapa makwinya, uye ganda rekwegura?
A Vitamin Inokosha
Kukosha kwevhitamini A kuhutano hwedu kwakazarurwa pakutanga kwezana remakore rechi20, nekuwanikwa kwebasa rayo mukubudirira kwemuviri.
Kubvira panguva iyo, yakawanikwa ichiri mutambi mukuru kwete kungoita zvekuberekwa, asiwo maonero, kukura, uye kuparadzanisa masero uye kupararira. Nemhaka yokuti inobatsira kugadzirwa kwemasero machena eropa, vitamini A inofanirwa kwehutachiona hwehutano hwakanaka.
Vitamin A inozivikanwawo se retinol, uye zvigadzirwa zvayo (kana zvisikwa kana zvinogadzirwa) zvinonzi retinoids. Nemhaka yokuti vitamini iyi haigoni kuumbwa nemuviri, inofanira kudyiwa muzvokudya - kana kuburikidza nemhuka, sezvinoitwa mazai ehova, hove, chiropa, uye nyama, kana michina yemiti, semichero yakajeka yemavara nemiriwo kusanganisira mbatata, uye tomato.
Rubatsiro rweKuti Rwegura
Maitiro eVitamin A iye zvino seguru rinopesana nekukwegura anoshamisika rakasvika kumashure kwema1980 apo vatsvakurudzi vakawana kuti inonzi tretinoin (zita rainzi Retin-A) yakabatsira kusimbisa kugadzirwa kwegogenjini mumagunha painoshandiswa pamusoro kune ganda rakagadzirwa -kureva, ganda risati rapera nemakore kusvibiswa kwe ultraviolet chiedza kubva kune zuva.
Kunyatsoenderana nekuwana uku kwaiva kuongororwa kwechiremba kunotsanangura tretinoin nokuda kwechigunzwa kuti varwere vaine ganda rinotonhora, nemavhirwere mashomanana. Tretinoin akazowanikwa akavhiringidzika nemakemikari anoshanda kuputsa collagen mu dermal ganda reganda uye kukurudzira kugadzirwa kwekorgenji itsva.
Kubvira panguva iyoyo, retinoids yakasvika pakuzivikanwa se "yegoridhe" yezvinhu zvemashoko ekurwisana nekukwegura, maererano nevanyori vekuongorora kwekutsvakurudza kwe2003 kwakabudiswa mu Journal of Drugs in Dermatology .
Zvakanaka, Zvakashata uye Zvakaipa zveTretinoin
Tretinoin muzvikamu zvakasiyana-siyana (kazhinji 0.01 - 0.1%) yakanyatsodzidza mune zvese zvenguva pfupi uye kwenguva refu, zvichienderana nekuongorora kwenguva refu kweCentral Interventions muAging .
Kunyange zvazvo shanduro yakashandurwa ye vitamin A inoshandiswa mumakemikari epine , isotretinoin (zita rinonzi Accutane ), yakabatsirawo varwere vane ganda rinononoka, rinopenya, muromo isotretinoin inotakura dambudziko guru rekuremara kwekuberekwa. Kunyange zvazvo zvinyorwa zvinyorwa zvisingarati zvaratidzwa mune zvidzidzo kuti zviitike mungozi mumwechete, dzimwe nhoroondo dzenyaya dzakaratidza kukanganisa pakati pevakadzi vachishandisa tretinoin paganda ravo mumutambo wekutanga wepamuviri. Saka vakadzi vanorayirwa kusashandisa chigadzirwa pavanenge vakabatwa.
Vashandi vekukumbira kunyunyuta vane tretinoin iyo inonzi side effect ikozvino inozivikanwa se retinoid dermatitis, inosanganisira redness, kutsamwa uye kuwedzera kunogona kuitika nokukurumidza kana mukati mavhiki mashomanana ekutanga kurapwa. Vanachiremba vanowanzokurudzira kutanga nehana yakadzika (0.01 - 0.025%), uye kuishandisa mumari shomanana zuva rimwe nerimwe.
Kushanduka kubva kune gel kusvika kune yakisi yemukisi kunogonawo kugadzirisa kusuruvara kweganda. Kamwe kushivirira kwakagadzirwa, kushandisa tretinoin zuva rega rega uye / kana kushandisa chiremba chakawedzerwa chinogona kuraswa.
Reverses Photoaging
Tretinoin inoita seinobudirira zvikuru pakuderedza mitsipa yakanaka yepiso nemakwenzi, kuderedza kusagadzikana, ganda rakagadzirwa, nekuvandudza kusagadzikana kwemavara. Zvinogona kutora mwedzi mishomanana kuti zviitiko izvi zvakanaka zvionekwe, uye mhinduro yacho inotarisirwa nezera, zvinoreva kuwedzera kwakasimba kunounza zviitiko zvinooneka zvakakurumidza. Semuenzaniso, apo 0.05% yakakosha inogona kuderedza zvikuru migumisiro yephotodamage, saka hafu yeiyo (kana 0.025%), asi iyo yekupedzisira inoda nguva yakareba.
Mafungiro ezasi pasi pe 0.01% haana kuonekwa kuti anobatsira ganda re photoaged.
Zvimwe zvinhu zvinoita kuti tretinoin mabasa aite zvakanaka anosanganisira genetics, huno rumwe ruvara rweganda, uye huwandu hwokuti photodamage.
Zvimwe mavitamini A Anowedzera
Kutadza kwaTretinoin yekukonzera kushungurudzwa kweganda uye kusarudzwa kwayo sechirwere (zvinoda mushonga) kwakakonzera tsvakurudzo yakawanda nevanokonzera zvipfeko nemishonga mumishonga yakabatana, isina simba. Pakati padzo pane retinol, retinaldehyde, uye retinyl palmitate. Retinol inoshandurwa kuva tretinoin mucheche, kunyange iyo inogadziriswa inongova 1/1000 iyo yetretinoin (uye naizvozvo isingatsamwi) iyo inoshandiswa pamusoro.
Zvigadzirwa zvakawanda zvevhitamin A zvakagadzirwa nokuda kwekurwisana nekwegura kwepamusoro yemisika kune michina yekuchengetedza - pasina tsvakurudzo yakabudiswa mumabhuku ezvidzidzo - saka zvinonetsa kuongorora.
Pasi Pasi
Vitamini A mishonga yakafanana neyemhando yepamusoro inoratidzirwa yakaratidzwa kuderedza makwenzi, kubwinya, uye kusina kufanana kwemavara, kunyange (zvinoshamisa) zvinogona kukonzera kubwinya nekutsamwa munguva pfupi. Kana uchida kuedza kuti vashandure photoaging, bvunza mutano wako wehutano kana kuona dermatologist yemuongorori. Pasi-the-counter mishonga ine mavitamine A anogadzirwa anogonawo kushanda kweganda rekukwegura, zvisinei nemigumisiro yacho inowanzosava inoshamisa, uye yakasimba kusimbisa.
Sources:
Kukwegura Kwekuchinja Mucheche. US National Institute of Health Medline Public Information Sheet. http://www.nlm.nih.gov/medlineplus/ency/article/004014.htm
Kockaert M, Neumann M. Systemic, uye mishonga yemasikirwo yeganda rekwegura. J Zvinodhaka Dermatol. 2003 Aug; 2 (4): 435-41.
Siddharth Mukherjee, Abhijit Date, Vandana Patravale, Hans Christian Korting, Alexander Roeder, naGünther Weindl. Retinoids mukurapa kwekukwegura kweganda: inongororongedza zvekurapa kwehutano nekuchengeteka. Clin Interv Aging. 2006 December; 1 (4): 327-348
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2699641/
Vitamin A. Nheyo dzeZvenyika dzeMweya Medline Public Information Sheet. http://www.nlm.nih.gov/medlineplus/druginfo/natural/964.html