Dawb tshuaj yej los ntawmCamellia sinensiscog ib yam li cov tshuaj yej dub, tshuaj yej ntsuab thiab oolong tshuaj yej. Nws yog ib qho ntawm tsib hom tshuaj yej uas hu ua tiag tiag teas. Ua ntej cov tshuaj yej dawb tawm qhib, lub buds tau sau rau zus tau tej cov tshuaj yej dawb. Cov buds no feem ntau yog them los ntawm cov plaub hau dawb minuscule, uas qiv lawv lub npe rau tshuaj yej. Cov tshuaj yej dawb yog tsuas yog sau nyob rau hauv Fujian xeev ntawm Tuam Tshoj, tab sis kuj muaj manufacturers nyob rau hauv Sri Lanka, Is Nrias teb, Nepal thiab Thaib teb.
Oxidation
Muaj tseeb teas tag nrho los ntawm nplooj ntawm tib cov nroj tsuag, yog li qhov sib txawv ntawm cov tshuaj yej yog raws li ob yam: terroir (chaw nyob rau hauv uas cov nroj tsuag yog zus) thiab cov txheej txheem ntau lawm.
Ib qho ntawm qhov sib txawv ntawm cov txheej txheem tsim khoom ntawm txhua qhov tseeb tshuaj yej yog lub sijhawm cov nplooj raug tso cai rau oxidize. Cov tshuaj yej masters tuaj yeem dov, zom, ci, hluav taws thiab chav nplooj los pab hauv cov txheej txheem oxidation.
Raws li tau hais, cov tshuaj yej dawb yog qhov ua tiav tsawg tshaj plaws ntawm cov tshuaj yej tiag tiag thiab yog li tsis dhau mus ntev oxidation txheej txheem. Hauv kev sib piv rau cov txheej txheem oxidation ntev ntawm cov tshuaj yej dub, uas ua rau muaj xim tsaus, nplua nuj xim, cov tshuaj yej dawb tsuas yog wither thiab qhuav nyob rau hauv lub hnub los yog ib puag ncig tswj kom khaws cia lub vaj-tshiab ntawm cov tshuaj ntsuab.
Flavour Profile
Txij li cov tshuaj yej dawb tau ua tiav tsawg kawg nkaus, nws muaj qhov muag muag muag nrog cov muag muag thiab xim daj daj. Nws muaj ib tug me ntsis qab zib tsw. Thaum brewed kom zoo, nws tsis muaj bold lossis iab saj. Muaj ntau ntau yam sib txawv, uas muaj fruity, zaub, ntsim thiab floral lus qhia.
Hom Tshuaj Dawb
Muaj ob hom tshuaj yej dawb: Silver Needle thiab Dawb Peony. Txawm li cas los xij, muaj ntau lwm cov tshuaj yej dawb suav nrog Long Life Eyebrow thiab Tribute Eyebrow nrog rau cov tshuaj pleev xim dawb xws li Ceylon White, African White thiab Darjeeling White. Silver Needle thiab Dawb Peony yog suav tias yog qhov zoo tshaj plaws thaum nws los txog rau qhov zoo.
Nyiaj koob (Bai Hao Yinzhen)
Silver Needle ntau yam yog cov tshuaj yej zoo tshaj plaws thiab zoo tshaj plaws. Nws muaj tsuas yog cov xim nyiaj xim buds txog 30 mm ntev thiab muaj lub teeb, qab zib tsw. Cov tshuaj yej yog tsim los siv tsuas yog cov nplooj me los ntawm cov tshuaj yej tsob nroj. Silver Needle dawb tshuaj yej muaj ib tug golden flush, floral aroma thiab ib tug woodsy lub cev.
Dawb Peony (Bai Mu Dan)
Dawb Peony yog qhov thib ob zoo tshaj plaws dawb tshuaj yej thiab muaj kev sib xyaw ntawm buds thiab nplooj. Feem ntau, Dawb Peony yog tsim los ntawm ob sab saum toj nplooj. Dawb Peony teas muaj lub zog saj profile dua li Silver Needle hom. Complex flavors muab cov ntawv sau paj nrog lub cev tag nrho thiab ib qho me ntsis nutty tiav. Cov tshuaj yej dawb no kuj suav hais tias yog ib qho kev siv nyiaj zoo hauv kev sib piv rau Silver Needle vim nws pheej yig dua thiab tseem muaj qhov tshiab, muaj zog tsw. Dawb Peony tshuaj yej yog daj ntseg ntsuab thiab kub dua li nws yog pricier lwm txoj.
Health Benefits of White Tea
1. Kev noj qab haus huv ntawm daim tawv nqaij
Ntau tus neeg tawm tsam nrog cov tawv nqaij irregularities xws li pob txuv, blemishes thiab discoloration. Txawm hais tias feem ntau ntawm cov tawv nqaij no tsis muaj kev phom sij lossis kev hem thawj rau lub neej, lawv tseem cuam tshuam thiab tuaj yeem txo kev ntseeg siab. Dawb tshuaj yej tuaj yeem pab koj ua tiav ib qho tawv nqaij ua tsaug rau cov tshuaj tua kab mob thiab antioxidant.
Ib txoj kev tshawb fawb los ntawm Kinsington University hauv London tau qhia tias cov tshuaj yej dawb tuaj yeem tiv thaiv cov tawv nqaij los ntawm kev puas tsuaj los ntawm hydrogen peroxide thiab lwm yam. Antioxidant-nplua nuj dawb tshuaj yej kuj pab tshem tawm cov dawb radicals uas tuaj yeem ua rau cov cim ntawm kev laus ntxov ntxov xws li pigmentation thiab wrinkles. Cov tshuaj tiv thaiv kab mob ntawm cov tshuaj yej dawb antioxidants tuaj yeem pab txo qhov liab thiab mob los ntawm cov kab mob ntawm daim tawv nqaij xws li eczema lossis dandruff (1).
Txij li pob txuv feem ntau tshwm sim los ntawm kev ua qias tuaj thiab dawb radical build-up, haus ib khob ntawm cov tshuaj yej dawb ib zaug los yog ob zaug ib hnub twg yuav tshem tawm ntawm daim tawv nqaij. Xwb, cov tshuaj yej dawb tuaj yeem siv los ua cov tshuaj ntxuav tes ncaj qha rau ntawm daim tawv nqaij. Koj tuaj yeem tso ib lub hnab tshuaj yej dawb ncaj qha rau ntawm txhua qhov teeb meem kom kho tau sai.
Ib txoj kev tshawb fawb xyoo 2005 los ntawm Pastore Formulations qhia tias cov tshuaj yej dawb tuaj yeem muaj txiaj ntsig zoo rau cov neeg uas raug kev txom nyem los ntawm cov tawv nqaij xws li rosacea thiab psoriasis. Qhov no tuaj yeem pab txhawb rau epigallocatechin gallate tam sim no hauv cov tshuaj yej dawb uas pab tsim cov hlwb tshiab hauv cov epidermis (2).
Cov tshuaj yej dawb muaj cov phenols ntau, uas tuaj yeem ntxiv dag zog rau ob qho tib si collagen thiab elastin qiv ib tug smoother, hluas dua rau ntawm daim tawv nqaij. Ob qho proteins no yog qhov tseem ceeb hauv kev tsim cov tawv nqaij muaj zog thiab tiv thaiv wrinkles thiab tuaj yeem pom hauv ntau yam khoom siv tawv nqaij.
2. Kev Tiv Thaiv Kab Mob
Cov kev tshawb fawb tau pom tias muaj kev sib txuas ntawm cov tshuaj yej tiag tiag thiab muaj peev xwm tiv thaiv lossis kho mob qog noj ntshav. Thaum cov kev tshawb fawb tsis tiav, cov txiaj ntsig kev noj qab haus huv ntawm haus cov tshuaj yej dawb feem ntau yog vim muaj cov antioxidants thiab polyphenols ntawm tshuaj yej. Antioxidants hauv tshuaj yej dawb tuaj yeem pab tsim RNA thiab tiv thaiv kev hloov pauv ntawm cov noob caj noob ces uas ua rau mob qog noj ntshav.
Ib txoj kev tshawb fawb xyoo 2010 pom tias cov tshuaj antioxidants hauv cov tshuaj yej dawb muaj txiaj ntsig zoo hauv kev tiv thaiv mob qog noj ntshav ntau dua li cov tshuaj yej ntsuab. Cov kws tshawb fawb tau siv cov tshuaj yej dawb los tsom rau cov qog nqaij hlav qog nqaij hlav hauv lub ntsws hauv qhov chaw kuaj mob thiab cov txiaj ntsig tau pom tias cov tshuaj tiv thaiv kab mob tuag. Thaum cov kev tshawb fawb tsis tu ncua, cov txiaj ntsig no qhia tau tias cov tshuaj yej dawb tuaj yeem pab nres qhov kev loj hlob ntawm cov qog nqaij hlav cancer thiab tseem ua rau muaj kev tuag ntawm cov hlwb hloov (3).
3. Kev poob phaus
Rau ntau tus neeg, kev poob phaus mus dhau tsuas yog ua lub Xyoo Tshiab daws teeb meem; Nws yog ib qho kev tawm tsam tiag tiag kom txo cov phaus thiab ua neej nyob ntev thiab noj qab haus huv. Kev rog rog yog ib qho ntawm cov ua rau lub neej luv luv thiab kev poob phaus yog nce nyob rau sab saum toj ntawm tib neeg qhov tseem ceeb.
Haus dej tshuaj yej dawb tuaj yeem pab koj ua tiav koj lub hom phiaj poob phaus los ntawm kev pab koj lub cev nqus cov as-ham zoo dua thiab poob phaus yooj yim dua los ntawm kev ua kom cov metabolism. Ib txoj kev tshawb fawb German xyoo 2009 pom tias cov tshuaj yej dawb tuaj yeem pab hlawv cov rog hauv lub cev thaum tseem tiv thaiv kev tsim cov rog tshiab. Catechins pom nyob rau hauv cov tshuaj yej dawb tuaj yeem ua kom cov txheej txheem digestive thiab pab kom poob phaus (4).
4. Cov plaub hau noj qab haus huv
Tsis tsuas yog dawb tshuaj yej zoo rau daim tawv nqaij, nws tseem tuaj yeem pab tsim cov plaub hau noj qab haus huv. Cov tshuaj antioxidant hu ua epigallocatechin gallate tau pom tias yuav txhim kho cov plaub hau kev loj hlob thiab tiv thaiv cov plaub hau ntxov ntxov. EGCG kuj tau qhia cov lus cog tseg thaum kho cov tawv nqaij tawv nqaij kab mob tshwm sim los ntawm cov kab mob uas tiv taus cov kev kho mob ntau yam (5).
Cov tshuaj yej dawb kuj tseem tiv thaiv lub hnub puas tsuaj, uas tuaj yeem pab ua kom cov plaub hau qhuav thaum lub caij ntuj sov. Cov tshuaj yej dawb tuaj yeem kho cov plaub hau ntuj ci thiab zoo tshaj plaws yog siv cov tshuaj zawv plaub hau yog tias koj tab tom nrhiav kom muaj txiaj ntsig rau qhov ci.
5. Txhim kho lub siab, ua kom pom tseeb thiab ceeb toom
Dawb tshuaj yej muaj qhov siab tshaj plaws ntawm L-theanine ntawm cov tshuaj yej tiag. L-theanine paub txog kev txhim kho kev ceeb toom thiab ua kom pom tseeb hauv lub hlwb los ntawm inhibiting stimuli exciting uas yuav ua rau overactivity. Los ntawm calming lub stimuli nyob rau hauv lub hlwb, tshuaj yej dawb tuaj yeem pab koj so thaum tseem ua kom pom tseeb (6).
Cov tshuaj lom neeg no kuj tau pom cov txiaj ntsig zoo rau kev noj qab haus huv thaum nws los txog rau kev ntxhov siab. L-theanine txhawb kev tsim cov neurotransmitter GABA, uas muaj cov nyhuv calming. Qhov zoo tshaj plaws txog kev haus dej tshuaj yej dawb yog koj tuaj yeem sau cov txiaj ntsig ntawm kev ceeb toom ntxiv yam tsis muaj kev phiv los ntawm kev qaug zog lossis kev puas tsuaj uas los nrog cov tshuaj tiv thaiv kev ntxhov siab.
Cov tshuaj yej dawb kuj muaj me me ntawm caffeine uas tuaj yeem pab pib koj lub hnub lossis muab kev tuaj tos kuv thaum tav su. Qhov nruab nrab, cov tshuaj yej dawb muaj txog 28 mg ntawm caffeine hauv txhua 8-ounce khob. Qhov ntawd tsawg dua qhov nruab nrab 98 mg hauv ib khob kas fes thiab me ntsis tsawg dua 35 mg hauv tshuaj yej ntsuab. Nrog rau cov ntsiab lus caffeine qis, koj tuaj yeem haus ob peb khob dej tshuaj yej ib hnub twg yam tsis muaj qhov tsis zoo uas cov khob kas fes muaj zog tuaj yeem muaj. Koj tuaj yeem muaj peb lossis plaub khob ib hnub thiab tsis txhawj xeeb txog kev ntxhov siab lossis pw tsaug zog.
6. Qhov ncauj noj qab haus huv
Cov tshuaj yej dawb muaj ntau ntau ntawm flavonoids, tannins thiab fluorides uas pab cov hniav noj qab haus huv thiab muaj zog. Fluoride yog nrov npe hu ua cov cuab yeej tiv thaiv cov hniav lwj thiab feem ntau pom muaj nyob rau hauv cov tshuaj txhuam hniav. Ob leeg tannins thiab flavonoids pab tiv thaiv kev tsim cov quav hniav uas tuaj yeem ua rau cov hniav lwj thiab kab noj hniav (7).
Dawb tshuaj yej kuj boasts antiviral thiab antibacterial zog uas pab kom cov hniav thiab cov pos hniav noj qab haus huv. Txhawm rau kom tau txais cov txiaj ntsig kev noj qab haus huv ntawm cov hniav ntawm cov tshuaj yej dawb, npaj kom haus ob mus rau plaub khob ib hnub thiab rov ua cov tshuaj yej hnab kom tshem tawm tag nrho cov as-ham thiab antioxidants.
7. Pab Kho Mob Ntshav Qab Zib
Mob ntshav qab zib yog tshwm sim los ntawm caj ces thiab kev ua neej nyob thiab yog ib qho teeb meem loj zuj zus hauv lub ntiaj teb niaj hnub no. Hmoov zoo, muaj ntau txoj hauv kev los tswj thiab tswj ntshav qab zib thiab tshuaj yej dawb yog ib qho ntawm lawv.
Catechins hauv tshuaj yej dawb nrog rau lwm cov tshuaj antioxidants tau pom tias pab tiv thaiv lossis tswj ntshav qab zib hom 2. Cov tshuaj yej dawb ua tau zoo los tiv thaiv kev ua haujlwm ntawm enzyme amylase uas qhia txog kev nqus cov piam thaj hauv cov hnyuv.
Hauv cov neeg mob ntshav qab zib hom 2, cov enzyme no zom cov hmoov txhuv nplej siab rau hauv cov suab thaj thiab tuaj yeem ua rau cov ntshav qab zib nce ntxiv. Haus dej tshuaj yej dawb tuaj yeem pab tswj cov kab mob no los ntawm kev thaiv cov khoom ntawm amylase.
Hauv kev tshawb fawb Suav xyoo 2011, cov kws tshawb fawb pom tias kev noj cov tshuaj yej dawb tsis tu ncua txo cov ntshav qabzib los ntawm 48 feem pua thiab nce insulin secretion. Txoj kev tshawb no tseem qhia tau hais tias haus cov tshuaj yej dawb pab txo cov ntshav qab zib polydipsia, uas yog nqhis dej ntau dhau los ntawm cov kab mob xws li ntshav qab zib (8).
8. Txo qhov mob
Cov catechins thiab polyphenols nyob rau hauv cov tshuaj yej dawb boasts anti-inflammatory zog uas tuaj yeem pab txo qhov mob me thiab mob. Ib txoj kev tshawb fawb tsiaj Nyij Pooj tau luam tawm nyob rau hauv MSSE Journal qhia tias catechins pom nyob rau hauv cov tshuaj yej dawb pab rau cov nqaij ntshiv kom rov zoo thiab tsawg dua cov leeg nqaij (9).
Cov tshuaj yej dawb kuj txhim kho kev ncig thiab xa cov pa oxygen mus rau lub hlwb thiab lub cev. Vim li no, tshuaj yej dawb muaj txiaj ntsig zoo hauv kev kho mob me me thiab mob thiab mob los ntawm kev ua haujlwm tawm.