Ukuguga Kwangaphakathi vs. Ukuguga Kwangaphandle: Ukuqonda Umehluko
Ukuguga akugwenywa, kodwa isivinini sokuguga kwesikhumba sakho sitholakala ngaphakathi kokulawula kwakho kakhulu kunalokho abantu abaningi abazi. Ucwaningo lwe-dermatology kanye ne-gerontology luveze kahle ukuthi iningi lokuguga kwesikhumba okubonakalayo kudalwa yizici zangaphandle ezivikelwe esikhathini eside kunokuhamba kwesikhathi okungagwenywa. Ukuqonda umehluko phakathi kokuguga kwemvelo nokuguga kwangaphandle, nokwazi ukuthi yiziphi izinyathelo ezineziqinisekiso zesayensi, kukhuthaza ukuba wenze izinqumo ezigcina ubusha besikhumba sakho ngendlela ephumelelayo kakhulu kunanoma iyiphi isikhangiso esingakwenza.
Ukuguga kwemvelo, okubizwa nangokuthi ukuguga kwesikhathi, kuyinqubo yemvelo, ehleliwe ngezakhi zofuzo eyenzeka kuzo zonke izikhumba ngaphandle kokubhekana nezimo zangaphandle. Kudalwa ngezici zangaphakathi — ukuhamba kwesikhathi kwezicubu, ukwehla kwezinga le-hormone, ukuncipha kokushintsha kwezicubu, kanye nokuncipha kancane kwe-telomeres okuhambisana nokuhlukana kwesicubu. Ukuguga kwemvelo kukhiqiza imigqa emincane, ukuncipha kwesikhumba, kanye nokuncipha kancane kokwelula, kodwa kuhamba kancane futhi ngokulinganayo.
Ukuguga kwangaphandle, ngokuphambene, kudalwa yizici zemvelo nezokuphila ezisheshisa inqubo yokuguga ngaphezu kwalokho okukhuluma ngakho kuphela. Izici eziphambili zokuguga kwangaphandle zifaka phakathi ukukhanya kwe-ultraviolet, ukungcoliswa, ukuhamba, ukudla okungafanele, kanye nengcindezi eqhubekayo. Ukuguga kwangaphandle kukhiqiza izinguquko eziningi abantu abaningi abahlanganisa nokuthi "blook old" — imigqa emikhulu, ukwehla okukhombisa, ukungalingani kokukhanya, ubukhulu obuphakeme, kanye nezitho ze-blood vessels eziphukile ezibonakalayo.
Isibonelo esivelele salo mhlangano sitholakala ezifundweni eziphakathi kwesikhumba esivikelwe elangeni nesikhumba esibhekene nelanga kumuntu ofanayo. Isandla esiphezulu somuntu, esithola ukukhanya okuncane elangeni impilo yonke, ngokuvamile sikhombisa iminyaka eminingi encane kunobuso babo, umhlane, noma izandla — nakuba zonke lezi zindawo zabelana ngofuzo olufanayo futhi zibe sezigugile iminyaka efanayo ngokuhamba kwesikhathi. Ukuhlolwa kwe-dermatological kukhombisa ukuthi kuze kube ngu-80 kuya ku-90 percent yokuguga kobuso obubonakalayo kungenxa yezici zokuguga kwangaphandle, lapho ukukhanya kwe-UV kuyinto eyodwa enkulu kakhulu.
Lokhu kusho ukuthi iningi lokuthi sithi "ukuguga" technically "damage" — futhi damage, ngokungafani nokuhamba kwesikhathi, kungenziwa kuncishiswe kakhulu ngezindlela ezifanele. Le mininingwane iyakhuthaza. Ngenkathi ungakwazi ukuvimba ukuguga kwemvelo, unganciphisa kakhulu ukuguga kwangaphandle ngokubhekana nezici ezishintshwayo ezikukhuthazayo. Izindlela ezichazwe ezicini ezilandelayo ziqondisa lezi zici ezithile ngezindlela ezisekelwa ubufakazi bezokwelapha kunokuhamba kwezokukhangisa.
Ukulimala Kwelanga: Isizathu Esikhulu Sokuguga Kwangaphambi kwesikhathi
Ukuguga kwesithombe — ukuguga kwesikhumba okubangelwa ukukhanya kwe-UV — kubhekelela iningi lemigqa emisha, izinguquko zokukhanya, kanye nokulahleka kokwelula kwesikhumba. Akukho enye into eyodwa edlula umthelela ophakeme okukhanya kwelanga onokwakhiwa kwesikhumba nokubukeka impilo yonke. Imisebe ye-UVA, ethola cishe u-95 percent wokukhanya kwe-UV ukufika emhlabeni, ingena ngaphakathi kakhulu kwi-dermis lapho i-collagen ne-elastin zikhona.
Zikhiqiza izinhlobo ze-oxygen eziphendulayo ezilimaza ngqo lezi zinsiza zokwakha kanye nezicubu ze-fibroblast ezikhiqiza zona. Ukukhanya kwe-UVA futhi kuveza ama-enzyme abizwa ngokuthi ama-matrix metalloproteinases aphula ngempela i-collagen ekhona. Umphumela omkhulu uwukuhlasela kabili — i-UV iyabhubhisa i-collagen futhi ithinteka ekubuyiseni kwayo.
Abacwaningi bacabanga ukuthi isenzakalo esisodwa sokukhanya okukhulu kwelanga singase sikhuthaze umsebenzi we-enzyme ophula i-collagen okukhona okutholakala ezinsukwini ezilandelayo, okusho ukuthi ngisho nezinsuku ezithile zokukhanya kwelanga zifaka isandla kakhulu ekugugeni kwesithombe eside.!! Imisebe ye-UVB, nakuba ibamba ingxenye encane yokukhanya kwe-UV, ibangela ukulimala okuqondile kwe-DNA ezicubwini zesikhumba futhi iyisizathu esiyinhloko sokukhanya kwelanga. Ukulungiswa komzimba kwalolu limala lwe-DNA akuphumeleli, futhi amaphutha aqoqwe ngokuhamba kwesikhathi anikela kokubili ekugugeni kwesithombe nasekutheni ubungozi bokukhula kwesikhumba.
Ukusebenzisa i-sunscreen ye-broad-spectrum nsuku zonke kuyindlela eyodwa ephumelelayo kakhulu yokulwa nokuguga. Bheka umhlahlandlela wethu daily sunscreen guide ukuze uthole izindlela ezinhle. Ucwaningo olukhulu lwase-Australia lwalandele abantu abangaphezu kuka-900 isikhathi esingaphezu kweminyaka emine futhi lwathola ukuthi labo ababephuza i-sunscreen nsuku zonke babonakali ukuthi bakhulelwe kakhulu ngesikhathi sokuhlola, kuyilapho iqembu lokulawula likhulelwe ngokweqile.
Lolu cwaningo lunikeza phakathi kokufakazela okuqinile ukuthi ukusebenzisa i-sunscreen okuqhubekayo kuvikela ngempela imigqa emisha nezinguquko zokukhanya — hhayi kuphela emthethweni, kodwa empeleni. Ngaphandle kwe-sunscreen, ukuziphatha okuvikela elangeni kubalulekile kakhulu. Ukufuna umthunzi phakathi nezikhathi eziphezulu ze-UV phakathi kwe-10 AM no-4 PM, ukugqoka izingubo ezivikela kuhlanganisa nezingubo ezine-hood, kanye nokusebenzisa ama-sunglasses avikela i-UV konke kunciphisa ukukhanya kwe-UV okuqoqiwe. Lezi zindlela zokuziphatha ziba zibalulekile kakhulu njengoba uguga, njengoba amandla okuphulukisa kwesikhumba kwehliswa ngokuhamba kwesikhathi.
Ama-Retinoids: I-Standard Yegolide Ekugugeni Kwezikhumba
Phakathi kwezinto zokwelapha ezivamile zokulwa nokuguga ezifundwe ku-dermatology, ama-retinoids anobufakazi obuqinile kakhulu. Avela ku-vitamin A, ama-retinoids asebenza ngezindlela eziningi ukuze aphikise kokubili ukuguga kwemvelo nokuguga kwangaphandle, okwenza kube yindlela ehlukile yokusebenza emhlabeni wezikhumba. Ama-retinoids asebenza ngokubopha kumarekhtha athile e-nuclear ezicubwini zesikhumba, athonya ngqo ukuveza kwamagene okuhlobene nokushintsha kwezicubu, ukukhiqizwa kwe-collagen, kanye nokukhanya.
I-Tretinoin, i-retinoid ethengiswa ngempela, ifundwe ezivivinyweni zokwelapha iminyaka eminingi. Ibonisa njalo ikhono lokwandisa ubukhulu be-epidermis, ukukhuthaza ukukhiqizwa kwe-collagen entsha kwi-dermis, ukunciphisa i-hyperpigmentation, nokuthuthukisa ubukhulu nesimo sesikhumba. I-Tretinoin iyona kuphela ingxenye yokwelapha enezinyanga ezingaphezu kwama-50 zobufakazi bezokwelapha obukhombisa ikhono layo lokubuyisela izimpawu ezibonakalayo zokuguga kwesithombe, kuhlanganisa nokubuyisela ukukhiqizwa kwe-collagen esikhumbeni esilimazekile elangeni.!!
I-retinol ethengiswa ngaphandle kwesokudla kufanele iguqulwe ibe yi-retinoic acid esikhumbeni ngokusebenzisa inqubo ye-enzymatic eminyakeni emibili, okwenza kube kuncane kodwa futhi kungabi namahloni kunama-tretinoin. Ama-retinoid amasha afana ne-adapalene, i-retinaldehyde, kanye ne-hydroxypinacolone retinoate anikeza izilinganiso ezahlukene zokusebenza nokubekezelela. Iphuzu eliyinhloko lokusebenzisa ama-retinoid ngempumelelo yisineke nokwethulwa kancane.
Ukuqala ngokuqina okuphansi izikhathi ezimbili kuya kwezintathu ngesonto bese kancane ukwandisa isikhawu ezinsukwini eziningi kuvumela isikhumba ukuba sithole umoya ngenkathi kunciphisa isikhathi sokuqala sokwethelela, ukuncipha, kanye nokukhathazeka. Ukufaka ama-retinoids esikhumbeni esomile kunokufaka esikhumbeni esimanzi, nokubufaka nge-moisturizer uma kudingeka, kunganciphisa kakhulu ukungakhululeki. Ama-retinoids akhuphula ukuvuvukala elangeni, okwenza ukusebenzisa i-sunscreen nsuku zonke kube okungathandwa ngesikhathi sokwelashwa kwe-retinoid.
Faka ama-retinoids ebusuku futhi uvikele ngokucophelela phakathi nosuku. Abanye abelaphi be-dermatology bacabanga ukuthi ukuhlanganiswa kokusebenzisa i-sunscreen nsuku zonke kanye nokusebenzisa i-retinoid ebusuku kuyindlela yokulwa nokuguga esekelwa kakhulu. Imiphumela yokusebenzisa ama-retinoid ithatha isikhathi — kulindeleke izinyanga ezintathu kuya kwezingu-6 zokusebenzisa okuqhubekayo ngaphambi kokuthi izinguquko ezibonakalayo emigqeni emincane nasemqondweni zivele. Ukwakhiwa kwe-collagen kuyinqubo yokuphila ethatha isikhathi, futhi izinguquko, nakuba ziqinile, zenzeka kancane kunokuphazamiseka.
Ama-Antioxidants Nokugcina I-Collagen
Ngenkathi ama-retinoids ekhuthaza ngempela ukukhiqizwa kwe-collagen entsha, ama-antioxidants asebenza njengomsebenzi ohlanganyelayo ngokuvikela i-collagen ekhona nezakhiwo ze-cells ekulimazeni kwe-oxidative. Ndawonye, lezi zigaba ezimbili zezithako zakha indlela ebanzi yokugcina ubukhulu besikhumba ngokuhamba kwesikhathi. I-Vitamin C, ngendlela yayo esebenzayo ye-L-ascorbic acid, iyona antioxidant yokwelapha efundwe kakhulu yokulwa nokuguga.
Ngama-concentration angu-10 kuya ku-20 percent, ivikela ama-free radicals akhiqizwa ukukhanya kwe-UV nokungcoliswa, ikhulisa ukukhiqizwa kwe-collagen ngokuba yisithako esidingekayo sama-enzyme akha ama-fiber e-collagen, futhi ivimbela ukukhiqizwa kwe-melanin ukuze ilinganiswe umbala wesikhumba. I-serum ye-vitamin C ehlelekile efakwe ekuseni inikeza ukuvikelwa okwengeziwe kokukhanya kwe-UV lapho isetshenziswa ngaphansi kwe-sunscreen. I-Vitamin E isebenza ngokubambisana ne-vitamin C, futhi amafomula aqukethe bobabili kanye ne-ferulic acid akhombisile ukuvikelwa okuphindwe kabili okungama-8 ngokumelene nokulimala kwe-free radical okubangelwa ukukhanya kwe-UV uma kuqhathaniswa nesikhumba esingavikelwe.
Le nhlanganisela imele enye yezinhlelo ezivivinywe kakhulu ze-antioxidant ezitholakalayo. I-Niacinamide, uhlobo lwe-vitamin B3, ixhasa ibhodi yesikhumba, inciphisa ukuvuvukala, futhi iboniswe ukuthuthukisa imigqa emincane, i-hyperpigmentation, kanye nokwelula kwesikhumba ezivivinyweni zokwelapha. Itholakala kahle ngempela kuzo zonke izinhlobo zesikhumba futhi ingahlanganiswa nezinye izithako ezisebenzayo ngaphandle kwezinkinga.
Ama-peptides ayizixhumanisi ezimfishane ze-amino acids ezisebenza njengama-molecule okukhuthaza esikhumbeni. Ezinye ama-peptides, ikakhulukazi i-palmitoyl pentapeptide-4 kanye nama-peptides e-copper, akhombisile ikhono lokukhuthaza ukukhiqizwa kwe-collagen ne-elastin ezifundweni zokwelapha. Ngenkathi ubufakazi be-peptides bungakabi banzi njengabo ama-retinoids noma i-vitamin C, banikeza inketho ethambile kulabo abangakwazi ukumelana nama-retinoids.
I-Coenzyme Q10, i-resveratrol, kanye ne-polyphenols ye-green tea ziqeda uhlu lwe-antioxidant ngezindlela zabo zokukhuthaza ukuvimbela kwe-free radical nokusebenza kokuvuvukala. Izindlela zokulwa nokuguga ezisebenza kahle zisebenzisa ama-antioxidants amaningi kunokuthembela kumkhiqizo owodwa, njengoba ama-antioxidants ahlukene aqondisa ezihlukene zokulimala kwe-oxidative futhi asebenza ezindaweni ezihlukene ze-cells.
Izici Zokuphila: Ukuhamba, Ukudla, Ukulala, Nokunye
Ngenkathi imikhiqizo yokufaka ithola ukunakwa okuningi ezingxoxweni zokulwa nokuguga, izici zokuphila zinefuthe elikhulu kakhulu ekugugeni kwesikhumba sakho. Izindlela ezithile ezishintshwayo zixhunywe ngokuqinile ekugugeni kwesikhumba okusheshayo noma okuncane ezifundweni ezinkulu. Ukuhamba kuyi-2 kuphela kokukhanya kwelanga njengomthombo wokuguga kwesikhumba okusheshayo.
Umoya we-tobacco uqukethe izinkulungwane zezakhi ezikhiqiza umonakalo omkhulu we-free radical, unciphisa izitho ze-blood vessels okunciphisa ukuhamba komoya nezinto ezidingekayo esikhumbeni, uthinte i-collagen ne-elastin, futhi unciphisa ukukhiqizwa kwe-collagen entsha. Ucwaningo oluqhathanisa ama-twins afanayo lapho omunye ehamba kanti omunye engahambi ubonisa ukuthi umntwana ophumayo ubonakala njalo eminyakeni eminingi, enezinhlamvu eziphawulekayo, ukwehla kwesikhumba, kanye nezikhwama ezingaphansi kwamehlo kunomfowabo ofanayo.!! Ukudla kudlala indima ebonakalayo ekugugeni kwesikhumba.
Njengoba kuboniswe emhlahlandleni wethu how diet affects your skin, ukudla okuphezulu ezithelo nasezithakeni ezine-antioxidant, ama-omega-3 fatty acids, kanye ne-proteins ezincane kusekela izinqubo zokuphulukisa zesikhumba, kuyilapho ukudla okuphezulu ngoshukela, okwenziwe kahle, kukhuthaza i-glycation kanye nokuvuvukala okwehlisa i-collagen. Ukuntuleka kokulala kuthinta izinqubo zokuphulukisa ezibhekelela impilo yesikhumba. I-hormone yokukhula, ekhishwa kakhulu ngesikhathi sokulala okujulile, ikhuthaza ukukhiqizwa kwe-collagen nokushintsha kwezicubu.
Ukuncipha kokulala okuqhubekayo kuholela ekwandeni kwe-cortisol, okwehlisa i-collagen, futhi kunciphisa isikhathi esitholakalayo sokuphulukisa kwesikhumba. Ukuphuza utshwala kuthinta ukuguga kwesikhumba ngokusebenzisa ukoma, ukuvuvukala, kanye nokwehluleka kokwamukela izinto ezidingekayo. Futhi, kukhulisa izitho ze-blood vessels, okungaholela ekubeni kube nokukhanya okungapheli kanye nezitho eziphukile, ikakhulukazi esikhumbeni sobuso.
Ukuhamba njalo kuhlelwa ekugugeni kwesikhumba ngokuthuthukisa ukuhamba, kunciphisa ukuvuvukala, futhi kwehlisa amazinga e-cortisol. Ucwaningo oluthile lukhombisa ukuthi ukuhamba kungase kuphinde kubuyisele ukuguga kwesikhumba kubantu abadala ngokuthuthukisa isakhiwo se-dermal ne-epidermal yesikhumba.
