Chinthu chachikulu chomwe chimapangitsa kuti khungu likalamba ndi:
Kuwala kwa UV, kujambula zithunzi
70% ya ukalamba wa khungu umachokera ku kujambula zithunzi
Kuwala kwa dzuwa kumakhudza collagen m'thupi lathu, zomwe zimapangitsa kuti khungu lizioneka lachinyamata. Ngati collagen ikachepa, khungu limakhala losalimba, lopindika, losawoneka bwino, losafanana ndi khungu, lokhala ndi pigmentation yambiri, lokhala ndi pigmentation ndi mavuto ena a pakhungu.
Ma radiation a dzuwa amagawidwa m'magulu awiri: UVA ndi UVB. Ma radiation a UVB ali ndi mafunde afupiafupi ndipo amatha kungotentha pamwamba pa khungu lathu, osatha kulowa mkati mwa khungu; komabe, ma radiation a UVA ali ndi mafunde aatali ndipo amatha kulowa mkati mwa galasi ndikulowa mkati mwa khungu, zomwe pamapeto pake zimafooketsa collagen ndikupangitsa kuti makwinya ayambe.
Mwachidule, UVA imayambitsa ukalamba, UVB imayambitsa kuyaka, ndipo kuwala kwa ultraviolet kumatha kuwononga DNA ya maselo, kuchepetsa ntchito ya fibroblast, ndipo kupanga kwa collagen kumatsekedwa, zomwe zimapangitsa kuti maselo asinthe, kukalamba, komanso apoptosis. Chifukwa chake, UV ili paliponse, kaya ndi dzuwa kapena mitambo, muyenera kuchita bwino ntchito yoteteza dzuwa.
Chinthu chachiwiri chofunika kwambiri pa ukalamba wa khungu
Ma free radicals opangidwa ndi okosijeni
Mawu ofunikira a ma free radicals ndi 'oxygen'. Timapuma pafupifupi 98 mpaka 99 peresenti ya mpweya nthawi iliyonse tikamapuma; umagwiritsidwa ntchito kuwotcha chakudya chomwe timadya ndikutulutsa mamolekyu ang'onoang'ono kuti maselo athu azitha kugayidwa, ndipo umatulutsa mphamvu zambiri kuti minofu yathu igwire ntchito.
Koma mwina 1% kapena 2% ya mpweya imasankha njira ina yoopsa, mpweya wochepa uwu, womwe nthawi zambiri umatchedwa ma free radicals, womwe umaukira maselo athu. Pakapita nthawi, kuwonongeka kumeneku kumawonjezeka pakapita nthawi.
Chodziwika kwambiri ndi zizindikiro za ukalamba zomwe zimaonekera pakhungu. Thupi lathu lili ndi njira yodzitetezera yomwe imakonza kuwonongeka komwe kumachitika ku maselo athu ndi ma free radicals, koma ma free radicals akamasonkhana mwachangu kuposa momwe maselo a thupi angawakonzere, khungu limakalamba pang'onopang'ono.
Chithunzi pamwambapa ndi khungu lenileni la thupi lathu, mutha kuwona bwino kuti khungu la pamwamba ndi lakuda ndipo dermis yapansi ndi yowala pang'ono, dermis ndi komwe timapangira collagen, ndipo maselo omwe amapanga collagen amatchedwa fibroblasts, omwe ndi makina opanga collagen.
Ma fibroblast omwe ali pakati pa chithunzicho ndi ma fibroblast, ndipo ukonde wa kangaude wozungulira iwo ndi collagen. Collagen imapangidwa ndi ma fibroblast, ndipo khungu laling'ono ndi lolumikizana bwino ndi collagen, ndipo ma fibroblast amakoka mwamphamvu ulusi wa collagen kuti khungu laling'ono likhale losalala komanso lokwanira.
Ndipo khungu lakale, ma fibroblast ndi kulumikizana kwa collagen pakati pa kusweka kwa ma fibroblast okalamba nthawi zambiri kumakana kulowa kwa collagen, pakapita nthawi, khungu linayambanso kukalamba, izi ndi zomwe nthawi zambiri timati kukalamba kwa khungu, kodi timathetsa bwanji kusungunuka kwa okosijeni pakhungu lomwe lalandiridwa?
Kuwonjezera pa kusamala kwambiri za mafuta oteteza ku dzuwa, tingagwiritse ntchito zina ndi vitamini A, vitamini E, ferulic acid, resveratrol ndi zina zomwe zimapezeka mu zinthu zosamalira khungu; nthawi zambiri timadyanso zipatso ndi ndiwo zamasamba zowala kwambiri, monga tomato, tomato ali ndi lycopene yambiri.
Imatha kuyamwa bwino mpweya ndikuletsa kupsinjika kwa okosijeni, muthanso kudya broccoli yambiri, broccoli ili ndi gawo lotchedwa mafuta a mustard glycosides, mukatha kudya izi, zimasungidwa pakhungu, kuti maselo akhungu athe kudziteteza okha, zipatso ndi ndiwo zamasamba izi zitha kulimbikitsa kukana kwa maselo kukalamba.
Chinthu chachitatu chofunika kwambiri pa ukalamba wa khungu
Kuchuluka kwa shuga m'magazi
Mwaukadaulo, glycation imatchedwa kuti non-enzyme glycosylation reaction kapena Melad reaction. Mfundo yake ndi yakuti kuchepetsa shuga kumalumikizana ndi mapuloteni popanda ma enzyme; kuchepetsa shuga kumasinthika kwambiri ndi mapuloteni, ndipo kuchepetsa shuga ndi mapuloteni kumachitika nthawi yayitali, kusungunuka kwa hydrogenation, ndi kukonzedwanso, zomwe zimapangitsa kuti pakhale kupanga zinthu zomaliza za glycosylation, kapena AGEs mwachidule.
Ma AGE ndi gulu la zinyalala zamoyo zomwe sizingasinthe, zachikasu-bulauni, zomwe siziopa kuwonongeka kwa ma enzyme, ndipo ndi chimodzi mwa zifukwa zazikulu za ukalamba wa anthu. Pamene tikukalamba, ma AGE amasonkhana m'thupi, zomwe zimapangitsa kuti makoma amkati mwa mitsempha yamagazi achuluke, kusalinganika kwa kagayidwe ka mafupa kamene kamayambitsa matenda a osteoporosis, komanso kuwonongeka kwa ulusi wa collagen ndi elastin mu dermis zomwe zimapangitsa kuti khungu likalamba. Kukalamba kwa khungu komwe kumachitika chifukwa cha glycation kwafotokozedwa mwachidule mu chiganizo chimodzi: shuga imawononga mapuloteni athanzi ndikusintha kapangidwe ka mapuloteni achichepere kukhala kapangidwe kakale ka mapuloteni, zomwe zimapangitsa kuti ukalamba ndi kutaya kulimba kwa collagen ndi ulusi wosalala mu dermis.
Nthawi yotumizira: Meyi-29-2024
