Ibintu bitatu bituma uruhu rusaza

Ikintu cya mbere mu gusaza k'uruhu:

imirasire ya UV, gufotora

70% by'ubusaza bw'uruhu bituruka ku gukoresha fotografiya

Imirasire ya UV igira ingaruka kuri kolajeni mu mubiri wacu, bigatuma uruhu rukomeza kugaragara nk'urukiri rukiri ruto. Iyo kolajeni igabanutse, uruhu ruzaba rufite ubushobozi bwo kugabanuka, rucika intege, uruhu rudasa neza, uruhu rukagira ibara ryinshi, ibara ryinshi, ibara ryinshi n'ibindi bibazo by'uruhu.

Imirasire ya UVB ifite uburebure bw'izuba bugabanyijemo kabiri UVA na UVB. Imirasire ya UVB ifite uburebure bw'izuba bugufi kandi ishobora gutwika urwego rwo hejuru rw'uruhu rwacu gusa, ntishobora kwinjira mu ruhu rwinshi; icyakora, imirasire ya UVA ifite uburebure bw'izuba kandi ishobora kwinjira mu kirahuri ikagera mu ruhu rwinshi, amaherezo igatuma collagen igabanuka bigatuma habaho iminkanyari.

Mu magambo make, UVA itera gusaza, UVB itera gushya, kandi urumuri rwa ultraviolet rushobora kwangiza ADN y'uturemangingo, kugabanya imikorere ya fibroblast, kandi collagen synthesis irahagarikwa, bigatuma ihinduka ry'uturemangingo, gusaza, no kubura umwuka. Rero, UV iri ahantu hose, haba hari izuba cyangwa ibicu, ugomba gukora akazi keza ko kurinda izuba.

Ikintu cya kabiri cy'ingenzi mu gusaza k'uruhu

Indabyo zikoresha ogisijeni

Ijambo ry'ingenzi ku binyabutabire byigenga ni 'ogisijeni'. Duhumeka hagati ya 98 na 99 ku ijana bya ogisijeni buri gihe duhumeka; ikoreshwa mu gutwika ibiryo turya no kurekura molekile nto kugira ngo uturemangingo twacu dukore, kandi irekura imbaraga nyinshi kugira ngo imitsi yacu ikore.

Ariko wenda 1% cyangwa 2% bya ogisijeni bihitamo inzira itandukanye kandi iteje akaga, iyi ogisijeni nto, ikunze kwitwa radicals libre, yibasira uturemangingo twacu. Uko igihe kigenda gihita, iyi ndwara irakomeza kwiyongera uko igihe kigenda gihita.

Ibimenyetso by’ubusaza bigaragara ku ruhu. Umubiri wacu ufite uburyo bwo kwirwanaho busana ibyangiritse byatewe n’uturemangingo tw’umubiri, ariko iyo uturemangingo tw’umubiri twiyongera vuba kurusha uko uturemangingo tw’umubiri dushobora kutwisana, uruhu rugenda rusaza buhoro buhoro.

Ishusho iri hejuru ni uruhu nyakuri rw'umubiri wacu, urabona neza ko uruhu rwo hejuru rw'inyuma rwijimye kandi uruhu rwo hasi rukagaragara gato, dermis niho dukora collagen, kandi uturemangingo dukora collagen twitwa fibroblasts, ari zo mashini zikora collagen.

Udukoko two mu bwoko bwa fibroblast turi hagati mu ishusho ni fibroblast, naho uruziga rw'igitagangurirwa ruyikikije ni collagen. Collagen ikorwa na fibroblast, kandi uruhu rukiri ruto ni urusobe rwa collagen rufite imiterere itatu kandi rufatanye neza, aho fibroblasts zikurura cyane imiyoboro ya collagen kugira ngo uruhu rukiri ruto rugire imiterere yuzuye kandi yoroshye.

Kandi uruhu rwa kera, fibroblasts na kolajeni ifitanye isano hagati yo gusenyuka kwa fibroblasts zishaje akenshi byanga kolajeni kwinjiramo, uko igihe kigenda gihita, uruhu narwo rwatangiye gusaza, ibi nibyo dukunze kuvuga gusaza k'uruhu, ni gute twakemura ikibazo cyo kuzura k'uruhu rwakiriye?

Uretse kwita cyane ku miti irinda izuba, dushobora gukoresha imwe irimo vitamine A, vitamine E, aside ferulic, resveratrol n'ibindi bintu bigize imiti ivura uruhu; ubusanzwe dushobora no kurya imbuto n'imboga bifite amabara meza cyane, nk'inyanya, inyanya zikungahaye kuri lycopene.

Ishobora kwinjiza umwuka wa ogisijeni neza ikarinda ogisijeni guhangayika, ushobora kandi kurya broccoli nyinshi, broccoli irimo igice cyitwa glycosides y'amavuta ya sinapi, nyuma yo kurya iki kintu, izabikwa mu ruhu, kugira ngo uturemangingo tw'uruhu tubashe kwikingira, izi mbuto n'imboga bishobora gutuma uturemangingo turwanya gusaza.

Ikintu cya gatatu cy'ingenzi mu gusaza k'uruhu

Kugabanya uruhu

Mu magambo y’umwuga, glycation yitwa reaction non-enzymatic glycosylation reaction cyangwa Melad reaction. Ihame ni uko kugabanya isukari bifatana na poroteyine mu gihe nta enzymes zihari; kugabanya isukari bishobora guhinduka cyane hamwe na poroteyine, kandi kugabanya isukari na poroteyine bihura n’ingaruka ndende zo kugabanya isukari, kubura umwuka, no kongera gutunganya ibintu, bigatuma habaho umusaruro wa glycosylation end-products mu gihe cya nyuma, cyangwa AGEs mu magambo ahinnye.

AGE ni itsinda ry'imyanda y'ibinyabuzima idahinduka, isa n'umuhondo, idatinya kwangirika kwa enzymes, kandi ni imwe mu mpamvu zikomeye zitera gusaza kw'abantu. Uko tugenda dusaza, AGE zirundanya mu mubiri, bigatuma inkuta z'imbere z'imiyoboro y'amaraso ziyongera, kudahuza kw'imikorere y'amagufwa bigatera indwara yo kubura amaraso, ndetse no kwangirika kwa collagen na elastin fibres muri dermis bigatera gusaza k'uruhu. Gusaza k'uruhu guterwa na glycation bikubiye mu nteruro imwe: isukari yangiza poroteyine nziza kandi igahindura imiterere ya poroteyine ntoya mo imiterere ya poroteyine ishaje, bigatera gusaza no kubura uburyo bworoshye bwa collagen na elastin fibres muri dermis.