Ntsuab tshuaj yej extract , tseem hu ua tshuaj yej tannin, yog lub npe dav dav rau ib chav kawm ntawm polyhydroxy phenolic tebchaw muaj nyob hauv tshuaj yej. Cov tshuaj yej ntsuab yog cov khoom xyaw ua haujlwm uas muab rho tawm los ntawm cov tshuaj yej ntsuab, feem ntau suav nrog tshuaj yej polyphenols (catechins), caffeine, roj tsw qab, noo noo, zaub mov, pigments, carbohydrates, protein, amino acids, vitamins, thiab lwm yam tseem ceeb yog tshuaj yej polyphenols. Cov tshuaj yej polyphenols muaj cov haujlwm ntawm kev tiv thaiv los tiv thaiv thiab tua kab mob radicals dawb. Lawv feem ntau siv rau hauv kev lag luam tshuaj pleev ib ce.
1. Cov tshuaj ntxuav dawb ntawm cov tshuaj yej ntsuab extract : Cov xim ntawm daim tawv nqaij yog tsuas yog txiav txim siab los ntawm melanin cov ntsiab lus. Melanin ntau lawm mechanism feem ntau pom tias yog tyrosine-catalyzed synthesis ntawm tyrosine hauv melanocytes.Currently siv feem ntau yog VE, VC, superoxide dismutase SOD, kojic acid, thiab cog cia, tag nrho cov ntawm muaj cov teebmeem ntxuav hniav dawb.
2. Qhov kev xav paub tsis meej ntawm cov tshuaj yej polyphenols: Polyphenols thiab cov protein ua ib qho kev tsis sib haum xeeb hauv daim ntawv ntawm hydrophobic bonds thiab nitrogen bonds. Hauv kev siv tshuaj txhua hnub, vim hais tias lawv ua rau tib neeg daim tawv nqaij ua rau ploj, nws feem ntau tau hais tias muaj kev astringency. Qhov laj thawj ncaj qha yog vim li cas tib neeg siv cov tshuaj polyphenols hauv cov tshuaj pleev ib ce yog lawv kev ua yuam kev. Cov cuab yeej no ua rau cov tshuaj pleev ib ce polyphenol muaj cov nplaum zoo rau cov tawv nqaij hauv qab cov dej tsis huv, thiab tuaj yeem ua qhov hws loj, ua rau cov tawv nqaij xoob tuaj yeem hloov kho, zawm thiab txo cov tawv nqaij, kom cov tawv nqaij zoo li muag heev.
3. Cov dej noo ua tau zoo ntawm cov tshuaj yej polyphenols: Siv tshuaj tiv thaiv kom zoo rau daim tawv nqaij kom du thiab du, thiab nws yog qhov tsim nyog siv cov dej-khaws cov khoom uas tuaj yeem cuam tshuam nrog dej ntawm thaj chaw ntawm daim tawv nqaij kom ua rau moisturize stratum corneum thiab ncua thiab tiv thaiv. daim tawv nqaij los ntawm nrov nrov. Tshuaj yej polyphenol yog ib hom ntawm cov khoom ntuj muaj cov nyhuv moisturizing. Vim tias nws cov molecule muaj cov qauv polyol, nws tuaj yeem nqus dej noo hauv huab cua. Lub moisturization ntawm tshuaj yej polyphenols tseem nyob hauv nws qhov kev tiv thaiv tsis zoo ntawm hyaluronidase. Yog li ua tiav lub tob physiological moisturizing siv nyob rau hauv cov khoom tu tawv nqaij.
4. Lub hnub tiv thaiv nyhuv ntawm cov tshuaj yej polyphenols : Cov tshuaj yej polyphenol hauv ntsuab tshuaj yej ntsuab yog cov dej ua kom tsis muaj hnub ci los tiv thaiv nrog ultraviolet nqus. Nws yog cov khoom siv ntuj tsim nrog kev nqus muaj zog hauv cheeb tsam lub teeb ci ultraviolet, thiab nws tsis yog-mob rau tib neeg lub cev. Polyphenols muab rho tawm tau paub tseeb. Los ntawm kev sib xyaw ntawm ntau cov polyphenols thiab flavones, qhov sib txawv ntawm kev nqus hauv thaj av ultraviolet tuaj yeem siv los txo qhov tsim ntawm daim tawv nqaij melanin thiab tiv thaiv kev laus tawv nqaij.
5. Los tiv thaiv wrinkle nyhuv ntawm cov tshuaj yej polyphenols: Cov tshuaj yej polyphenols muaj qhov cuam tshuam rau collagenase thiab elastase, tuaj yeem tiv thaiv cov ntsiab lus ntawm elastin los ntawm poob lossis degeneration, tswj daim tawv nqaij elasticity thiab anti-wrinkle.
6. Lwm yam kev noj qab haus huv los ntawm tshuaj yej ntawm daim tawv nqaij Tea polyphenols muaj ntau yam kev ua haujlwm ntawm pharmacological thiab physiological, xws li polyphenols 'sib sib zog nqus, hemostasis, bacteriostatic, tiv thaiv, thiab tawm tsam. Lawv tuaj yeem raug siv los ua exogenous tus neeg sawv cev los kho ntau yam tawv nqaij ua kom tawv nqaij thiab ua kom lub qhov txhab zoo.
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