Peb yam ntawm Cov tawv nqaij laus

Qhov thib ib yam ntawm daim tawv nqaij laus:

UV hluav taws xob, photoaging

70% ntawm daim tawv nqaij laus pib los ntawm photoaging

UV rays cuam tshuam rau collagen hauv peb lub cev, uas ua rau cov tawv nqaij saib hluas. Yog hais tias collagen shrinks, daim tawv nqaij yuav txo elasticity, sagging, dullness, tawv nqaij tsis sib xws, hyperpigmentation, pigmentation thiab lwm yam teeb meem ntawm daim tawv nqaij.

Lub hnub lub dav spectrum muab faib ua UVA thiab UVB. UVB rays muaj luv wavelengths thiab tsuas tuaj yeem hlawv cov txheej saum toj kawg nkaus ntawm peb cov tawv nqaij, tsis tuaj yeem nkag mus tob rau hauv daim tawv nqaij; Txawm li cas los xij, UVA rays muaj qhov ntev wavelengths thiab tuaj yeem nkag mus rau hauv cov iav thiab tob rau hauv daim tawv nqaij, thaum kawg ua rau cov collagen tsis muaj zog thiab ua rau txoj kev loj hlob ntawm wrinkles.

Hauv cov ntsiab lus yooj yim, UVA ua rau kev laus, UVB ua rau kub hnyiab, thiab ultraviolet lub teeb tuaj yeem ua rau cov cellular DNA, txo cov haujlwm fibroblast, thiab collagen synthesis raug thaiv, ua rau kev hloov ntawm tes, kev laus, thiab apoptosis. Yog li, UV yog nyob txhua qhov chaw, txawm tias hnub ci lossis huab cua, koj yuav tsum ua txoj haujlwm zoo ntawm kev tiv thaiv tshav ntuj.

Qhov thib ob tseem ceeb tshaj plaws ntawm daim tawv nqaij laus

Oxidative dawb radicals

Lo lus tseem ceeb rau cov dawb radicals yog 'oxygen'. Peb ua pa li 98 txog 99 feem pua ​​​​ntawm cov pa txhua zaus peb ua pa; Nws yog siv los hlawv cov zaub mov uas peb noj thiab tso cov molecules me me rau peb cov hlwb kom metabolise, thiab nws tso tawm ntau lub zog los ua kom peb cov leeg ua haujlwm.

Tab sis tej zaum 1% lossis 2% ntawm cov pa oxygen xaiv txoj kev sib txawv thiab txaus ntshai, qhov me me ntawm oxygen, feem ntau hu ua dawb radicals, uas tawm tsam peb cov hlwb. Thaum lub sij hawm, qhov kev puas tsuaj no accumulates nyob rau lub sij hawm.

Qhov pom tshaj plaws yog cov cim ntawm kev laus uas tshwm sim ntawm daim tawv nqaij. Peb lub cev muaj cov txheej txheem tiv thaiv uas kho cov kev puas tsuaj ua rau peb cov hlwb los ntawm cov dawb radicals, tab sis thaum cov dawb radicals sib sau sai dua li lub cev cov hlwb tuaj yeem kho lawv, daim tawv nqaij maj mam muaj hnub nyoog.

Daim duab saum toj no yog cov ntaub so ntswg tiag tiag ntawm peb lub cev, koj tuaj yeem pom tseeb tias cov epidermis sab saum toj yog tsaus dua thiab hauv qab dermis yog me ntsis ci dua, lub dermis yog qhov chaw uas peb tsim collagen, thiab cov hlwb uas tsim collagen hu ua fibroblasts, uas yog. collagen ua tshuab.

Cov fibroblasts nyob nruab nrab ntawm daim duab yog cov fibroblasts, thiab kab laug sab web ncig lawv yog collagen. Collagen yog tsim los ntawm fibroblasts, thiab cov tawv nqaij hluas yog peb-dimensional thiab nruj knit collagen network, nrog fibroblasts muaj zog rub ntawm collagen fibers kom cov tub ntxhais hluas daim tawv nqaij puv thiab du.

Thiab cov tawv nqaij laus, fibroblasts thiab collagen txuas ntawm kev sib cais 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 cov tawv nqaij li cas. daim tawv nqaij tau txais?

Ntxiv nrog rau kev them nyiaj ntau dua rau cov tshuaj pleev thaiv hnub, peb tuaj yeem siv qee yam nrog cov 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 ntau dua, xws li txiv lws suav, txiv lws suav yog nplua nuj nyob rau hauv lycopene.

Nws tuaj yeem nqus cov pa oxygen zoo thiab tiv thaiv oxidative kev nyuaj siab, koj tuaj yeem noj zaub paj ntau dua, broccoli muaj cov khoom xyaw hu ua mustard roj glycosides, tom qab noj cov khoom no, lawv yuav khaws cia rau hauv daim tawv nqaij, kom cov tawv nqaij tuaj yeem tiv thaiv tus kheej. , cov txiv hmab txiv ntoo thiab zaub no tuaj yeem txhawb cov cell tiv thaiv kev laus.

Qhov thib peb tseem ceeb tshaj plaws ntawm daim tawv nqaij laus

Daim tawv nqaij glycation

Glycation, nyob rau hauv cov nqe lus ntawm kev tshaj lij, yog hu ua non-enzymatic glycosylation cov tshuaj tiv thaiv lossis Melad cov tshuaj tiv thaiv. Lub hauv paus ntsiab lus yog tias txo cov suab thaj khi rau cov proteins thaum tsis muaj enzymes; Kev txo cov suab thaj yog rov qab tau zoo nrog cov proteins, thiab txo cov suab thaj thiab cov proteins kom dhau mus ntev oxidation, dehydrogenation, thiab rov kho cov tshuaj tiv thaiv, ua rau kev tsim cov glycosylation kawg-cov khoom, lossis AGEs luv luv.

AGEs yog ib pawg ntawm kev rov qab tsis tau, daj-xim av, cuam tshuam cov khoom pov tseg uas tsis ntshai ntawm kev puas tsuaj enzyme, thiab yog ib qho ntawm cov neeg ua txhaum loj ntawm tib neeg kev laus. Raws li peb muaj hnub nyoog, AGEs khaws cia hauv lub cev, ua rau muaj zog ntawm cov phab ntsa sab hauv ntawm cov hlab ntsha, qhov tsis txaus ntawm cov pob txha metabolism ua rau pob txha, thiab kev puas tsuaj ntawm collagen thiab elastin fibers hauv cov tawv nqaij ua rau tawv nqaij laus. Kev laus ntawm daim tawv nqaij tshwm sim los ntawm glycation yog sau nyob rau hauv ib kab lus: qab zib rhuav tshem cov proteins uas noj qab nyob zoo thiab hloov cov qauv ntawm cov protein rau hauv cov qauv qub, ua rau kev laus thiab poob ntawm cov nqaij mos. elasticity ntawm collagen thiab elastic fibers nyob rau hauv lub dermis.