Tej zaum koj yuav paub tias ntau yam khoom noj uas peb yuav hauv khw lossis hauv khw loj muaj ntau yam khoom ntxiv rau hauv kom lawv tshiab thiab khaws lawv cov saj. Tab sis koj puas paub tseeb tias cov khoom ntxiv no cuam tshuam li cas rau peb txoj kev noj qab haus huv? Hnub no peb tab tom tham txog ib yam dab tsi uas ntau tus neeg tab tom tham txog. Ntawd yog sodium nitrate.
Sodium Nitrate yog dab tsi?
Hais yooj yim xwb, sodium nitrate thiab nws cov txheeb ze ze, sodium nitrite, yog cov tshuaj preservatives. Feem ntau lawv siv rau hauv cov khoom "kho nqaij", xws li sausages, bacon, ham, thiab meatballs. Lawv tsis yog tsuas yog ntxiv rau kom khaws cov nqaij ntev dua, tab sis kuj kom muab nws xim liab thiab saj tshwj xeeb.
Tiamsis qhov xav tsis thoob yog tias cov nitrates thiab nitrites no tsis yog tsuas pom muaj nyob rau hauv cov khoom noj uas ntxiv dag zog xwb. Lawv kuj pom muaj nyob rau hauv cov zaub xws li spinach thiab celery . Thiab txawm tias cov dej kais uas peb haus kuj muaj qee yam ntawm lawv.
Peb lub cev puas xav tau nitrates tiag?
Yog lawm, nitrates thiab nitrites yog qhov tsim nyog rau ntau yam txheej txheem tseem ceeb hauv peb lub cev. Qhov tseeb, tsuas yog 85% ntawm cov nitrates uas peb noj hauv peb cov zaub mov los ntawm zaub .
Tej yam uas tshwm sim hauv peb lub cev yog ib qho tseem ceeb heev. Cov nitrates uas peb noj raug hloov mus ua nitrites los ntawm lub cev. Cov nitrites no ces hloov mus ua ib qho ntawm ob qho txiaj ntsig. Ib qho yog qhov txiaj ntsig zoo heev rau peb, thiab qhov thib ob yog qhov txiaj ntsig txaus ntshai me ntsis.
Qhov zoo: Nitric Oxide
Nov yog "tus neeg zoo" hauv peb zaj dab neeg. Nitric oxide, ib qho molecule tsim los ntawm nitrite, yog qhov tseem ceeb rau peb lub plawv noj qab haus huv.
- Nws pab txo cov ntshav siab .
- Nws ua rau cov hlab ntsha nthuav dav thiab txhim kho kev ncig ntshav .
- Qhov no ua rau nws pab tau zoo heev rau kev tiv thaiv kab mob plawv .
Qhov no yog vim li cas kev noj zaub mov ntau ntau thiaj li hais tias zoo rau lub plawv. Vim tias zaub muab cov nitrates uas peb lub cev xav tau los tsim cov nitric oxide.
Sab txaus ntshai: Nitrosamines
Nov yog tus "neeg phem" hauv zaj dab neeg. Nitrate thiab nitrite lomQhov laj thawj tseem ceeb uas ua rau nws suav tias yog tshuaj lom thiab txaus ntshai yog vim muaj cov tshuaj hu ua nitrosamines. Cov no yog cov carcinogens , txhais tau tias lawv yog cov tshuaj uas muaj peev xwm ua rau mob qog noj ntshav.
Qhov no yog vim li cas lub Koom Haum Kev Noj Qab Haus Huv Ntiaj Teb (WHO) tau tshaj tawm tias cov nqaij ua tiav lawm yog cov carcinogen . Thaum kub siab, nitrites yuav ua rau cov protein hauv nqaij ua rau cov nitrosamines txaus ntshai no.
Qhov tseeb zais tom qab daim ntawv lo "Nitrate-Free"
Tam sim no, thaum koj mus rau lub khw muag khoom loj, tej zaum koj tau pom cov hnyuv ntxwm thiab nqaij npuas kib uas muaj cov ntawv sau xws li " organic ", "tsis muaj nitrates ntxiv", thiab "tsis muaj nitrate". Muaj ntau tus neeg xav tias cov no muaj kev nyab xeeb kiag li. Tab sis muaj ib qho zais me me ntawm no uas peb yuav tsum paub.
Lawv xav tau ib txoj hauv kev los khaws cov khoom uas hu ua "tsis muaj nitrate". Rau qhov ntawd, lawv siv hmoov celery .
Xav txog nws, celery yog ib qho zaub uas muaj nitrate ntau. Yog li ntawd, qhov uas tshwm sim thaum koj ntxiv hmoov celery yog tib yam li qhov uas tshwm sim thaum koj ntxiv cov tshuaj sodium nitrate uas tsim tawm. Qhov ntawd txhais tau tias cov khoom ntawd kuj muaj nitrates. Txawm hais tias nws tuaj yeem sau tias "tsis muaj nitrate" vim tias nws tsis tau ntxiv tshuaj lom neeg, raws li txoj cai, cov teebmeem rau lub cev yog tib yam. Cov nitrates ntawd kuj tuaj yeem hloov mus ua nitrosamines.
Qhov tseem ceeb tshaj plaws uas yuav tsum tau them sai sai yog:
- Muaj kev cai lij choj txwv tsis pub muaj cov nitrates uas muaj tshuaj lom neeg ntxiv rau. Cov koom haum xws li FDA (Food and Drug Administration) tau teem sijhawm teev cov nitrates ntau tshaj plaws uas muaj nyob hauv ib yam khoom.
- Tiamsis cov nitrates ntxiv los ntawm cov khoom ntuj tsim, xws li hmoov celery, tsis raug tswj hwm nruj heev. Qee qhov kev tshawb fawb tau qhia tias cov khoom "ntuj tsim" no muaj peev xwm muaj nitrates txog li kaum npaug ntau dua li cov uas ua los ntawm cov txheej txheem ib txwm muaj.
| Hom nqaij ua tiav (Khoom) | Kev txwv raws cai (ppm - ib feem ib lab) |
|---|---|
| Nqaij npuas kib | 120 ppm (0.012%) |
| Cov hnyuv ntxwm kho | 156 ppm (0.0156%) |
| Nqaij npuas los yog pastrami uas tau kho nrog dej ntsev | 200 ppm (0.02%) |
Yog li ntawd, qhov kev txiav txim zaum kawg yog dab tsi? Puas yog sodium nitrate txaus ntshai tiag?
Raws li cov ntaub ntawv tam sim no, nws tsis tau meej meej tias cov tshuaj sodium nitrate nws tus kheej puas txaus ntshai. Raws li peb tau pom, nws yog ib yam dab tsi uas tsim nyog rau peb lub cev, tshwj xeeb tshaj yog rau kev noj qab haus huv ntawm lub plawv.
Tus neeg ua txhaum tiag tiag tsis yog cov nitrates lawv tus kheej, tab sis qhov chaw uas peb tau txais cov nitrates ntawd.
Xav txog qhov no zoo li cov vitamin. Cov vitamins yog qhov tseem ceeb rau peb lub cev. Tab sis yog tias koj noj ntau dhau, lawv kuj tuaj yeem ua rau lom. Yog li ntawd nws yog li cas.
Txoj kev noj qab haus huv tshaj plaws kom tau nitrates yog los ntawm zaub, es tsis yog los ntawm cov nqaij ua tiav.
yog vim li cas?
Nrog rau cov nitrates, zaub kuj muaj ntau yam as-ham, xws li cov antioxidants xws li vitamin C thiab fiber. Cov antioxidants no tuaj yeem tiv thaiv cov nitrates los ntawm kev tsim cov nitrosamines txaus ntshai. Qhov no txhais tau tias peb tsuas yog tau txais qhov zoo ntawm nitrates los ntawm zaub.
Tiamsis cov nqaij ua tiav lawm tsis muaj cov as-ham zoo no. Lawv kuj muaj ntsev ntau thiab cov rog tsis zoo rau kev noj qab haus huv. Yog li ntawd, lawv yuav tsim cov nitrosamines ntau dua.
Yog li ntawd, es tsis txhob txhawj txog cov nitrates, ua tib zoo saib seb koj tau los qhov twg. Nws tsis yog ib qho teeb meem loj rau kev noj cov nqaij ua tiav qee zaum, tab sis nws yog ib qho kev txawj ntse kom tsis txhob muab lawv ua ib feem ntawm koj cov zaub mov txhua hnub.
Cov Lus Qhia Txog Kev Coj Mus Tsev
- Sodium nitrate siv los khaws cov nqaij ua tiav lawm, tab sis nws kuj pab peb lub cev tsim cov nitric oxide.
- Cov nitrates tsuas yog ua rau muaj kev phom sij thaum lawv hloov mus ua nitrosamines, uas yog cov carcinogen. Qhov no feem ntau tshwm sim thaum koj noj cov nqaij ua tiav lawm.
- Cov ntawv lo "Tsis Muaj Nitrate" feem ntau muaj cov nitrate los ntawm tej yam ntuj tso, xws li hmoov celery. Cov no qee zaum muaj cov nitrate ntau dua li cov khoom ib txwm.
- Txoj kev zoo tshaj plaws thiab muaj kev nyab xeeb tshaj plaws kom tau txais nitrates yog noj cov zaub xws li spinach thiab beetroot. Cov antioxidants hauv lawv tiv thaiv kev tsim cov nitrosamines.
- Noj cov khoom noj xws li nqaij qaib thiab nqaij npuas qee zaum, tab sis tsis txhob muab lawv ua ib feem ntawm koj cov zaub mov txhua hnub. Ua tib zoo saib xyuas kev noj zaub mov kom sib npaug, tshwj xeeb yog zaub thiab txiv hmab txiv ntoo.
- Yog tias koj muaj kev txhawj xeeb lossis kev tsis ntseeg txog koj cov zaub mov noj lossis kev noj qab haus huv ntawm lub plawv, ib txwm sab laj nrog koj tus kws kho mob hauv tsev neeg (kws kho mob) kom tau lus qhia.
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Tsis muaj lus teb tau muab tso tawm. Ntxiv koj cov lus tawm ntawm no thawj zaug.
Ntxiv koj cov lus