Qhov tseem ceeb tshaj plaws hauv kev laus ntawm daim tawv nqaij:
Kev tawg ntawm UV, kev laus ntawm daim tawv nqaij
70% ntawm kev laus ntawm daim tawv nqaij yog los ntawm kev laus ntawm lub teeb
Cov teeb UV cuam tshuam rau cov collagen hauv peb lub cev, uas ua rau daim tawv nqaij zoo li hluas. Yog tias collagen poob qis, daim tawv nqaij yuav tsis muaj zog, qaug zog, tsis ci ntsa iab, tawv nqaij tsis sib luag, muaj xim ntau dhau, xim tawv nqaij thiab lwm yam teeb meem ntawm daim tawv nqaij.
Lub hnub lub spectrum dav dav muab faib ua UVA thiab UVB. UVB rays muaj cov wavelengths luv luv thiab tsuas yog hlawv txheej sab saud ntawm peb daim tawv nqaij xwb, tsis tuaj yeem nkag mus tob dua rau hauv daim tawv nqaij; txawm li cas los xij, UVA rays muaj cov wavelengths ntev thiab tuaj yeem nkag mus rau hauv daim iav thiab tob dua rau hauv daim tawv nqaij, thaum kawg ua rau cov collagen qaug zog thiab ua rau muaj kev loj hlob ntawm wrinkles.
Hauv cov lus yooj yim, UVA ua rau laus, UVB ua rau kub hnyiab, thiab lub teeb ultraviolet tuaj yeem ua rau lub cell DNA puas tsuaj, txo cov fibroblast ua haujlwm, thiab collagen synthesis raug thaiv, ua rau cell hloov pauv, laus, thiab apoptosis. Yog li, UV nyob txhua qhov chaw, txawm tias nws yog hnub ci lossis huab, koj yuav tsum ua haujlwm zoo ntawm kev tiv thaiv hnub.
Qhov thib ob tseem ceeb tshaj plaws hauv kev laus ntawm daim tawv nqaij
Cov tshuaj oxidative dawb
Lo lus tseem ceeb rau cov free radicals yog 'oxygen'. Peb ua pa li ntawm 98 txog 99 feem pua ntawm cov pa oxygen txhua zaus peb ua pa; nws siv los hlawv cov khoom noj uas peb noj thiab tso cov molecule me me rau peb cov cell kom metabolise, thiab nws tso tawm ntau lub zog los ua kom peb cov leeg ua haujlwm.
Tiamsis tej zaum 1% lossis 2% ntawm cov pa oxygen xaiv txoj kev sib txawv thiab txaus ntshai, qhov me me ntawm cov pa oxygen no, feem ntau hu ua cov free radicals, uas tawm tsam peb cov cell. Raws li lub sijhawm dhau mus, qhov kev puas tsuaj no sib sau ua ke raws li lub sijhawm.
Qhov pom tseeb tshaj plaws yog cov cim qhia tias daim tawv nqaij laus zuj zus. Peb lub cev muaj ib txoj kev tiv thaiv uas kho qhov puas tsuaj uas ua rau peb cov hlwb los ntawm cov free radicals, tab sis thaum cov free radicals sib sau ua ke sai dua li lub cev cov hlwb kho tau lawv, daim tawv nqaij maj mam laus zuj zus.
Daim duab saum toj no yog cov tawv nqaij tiag tiag ntawm peb lub cev, koj tuaj yeem pom tseeb tias sab saum toj epidermis tsaus dua thiab hauv qab dermis ci dua me ntsis, dermis yog qhov chaw peb tsim collagen, thiab cov hlwb uas tsim collagen hu ua fibroblasts, uas yog cov tshuab ua collagen.
Cov fibroblasts nyob hauv nruab nrab ntawm daim duab yog cov fibroblasts, thiab lub vas sab nyob ib puag ncig lawv yog collagen. Collagen yog tsim los ntawm fibroblasts, thiab daim tawv nqaij hluas yog ib lub network collagen peb-seem thiab sib txuas nruj nreem, nrog rau fibroblasts rub cov collagen fibers kom muab cov tawv nqaij hluas kom puv thiab du.
Thiab cov tawv nqaij qub, fibroblasts thiab collagen txuas ntawm qhov kev tawg ntawm cov laus fibroblasts yuav feem ntau tsis kam collagen nkag mus, dhau sijhawm, daim tawv nqaij kuj pib laus, qhov no yog qhov peb feem ntau hais tias daim tawv nqaij laus, peb yuav daws qhov oxidation ntawm daim tawv nqaij tau txais li cas?
Ntxiv rau kev them sai sai rau cov tshuaj pleev thaiv hnub, peb tuaj yeem siv qee cov khoom uas muaj vitamin A, vitamin E, ferulic acid, resveratrol thiab lwm yam khoom xyaw ntawm cov khoom tu tawv nqaij; feem ntau kuj tuaj yeem noj cov txiv hmab txiv ntoo thiab zaub uas muaj xim ci ntsa iab dua, xws li txiv lws suav, txiv lws suav nplua nuj nyob rau hauv lycopene.
Nws tuaj yeem nqus tau cov pa oxygen zoo thiab tiv thaiv kev ntxhov siab oxidative, koj tuaj yeem noj ntau dua broccoli, broccoli muaj cov khoom hu ua mustard roj glycosides, tom qab noj cov khoom xyaw no, lawv yuav khaws cia rau hauv daim tawv nqaij, yog li cov hlwb tawv nqaij tuaj yeem tiv thaiv tus kheej, cov txiv hmab txiv ntoo thiab zaub no tuaj yeem txhawb kev tiv thaiv cell rau kev laus.
Qhov tseem ceeb thib peb hauv kev laus ntawm daim tawv nqaij
Kev hloov pauv ntawm daim tawv nqaij
Glycation, hauv cov lus tshaj lij, hu ua kev tshuaj tiv thaiv glycosylation uas tsis yog enzymatic lossis Melad reaction. Lub hauv paus ntsiab lus yog tias kev txo cov suab thaj khi rau cov protein thaum tsis muaj enzymes; kev txo cov suab thaj yog qhov rov ua dua nrog cov protein, thiab kev txo cov suab thaj thiab cov protein dhau los ntawm kev oxidation ntev, dehydrogenation, thiab kev hloov pauv tshiab, ua rau muaj kev tsim cov khoom kawg glycosylation, lossis AGEs luv luv.
Cov AGEs yog ib pawg ntawm cov khib nyiab uas tsis rov qab tau, xim daj-xim av, uas tsis ntshai kev puas tsuaj ntawm cov enzyme, thiab yog ib qho ntawm cov neeg ua rau tib neeg laus. Thaum peb laus zuj zus, cov AGEs sib sau ua ke hauv lub cev, ua rau cov phab ntsa sab hauv ntawm cov hlab ntsha tawv zuj zus, kev tsis sib npaug ntawm cov pob txha metabolism ua rau osteoporosis, thiab kev puas tsuaj ntawm collagen thiab elastin fibers hauv dermis ua rau daim tawv nqaij laus zuj zus. Kev laus ntawm daim tawv nqaij los ntawm glycation tau muab sau ua ib kab lus: qab zib rhuav tshem cov protein noj qab haus huv thiab hloov cov qauv protein hluas mus rau hauv cov qauv protein qub, ua rau laus zuj zus thiab poob ntawm elasticity ntawm collagen thiab elastic fibers hauv dermis.
Lub sijhawm tshaj tawm: Tsib Hlis-29-2024
