I-Mercury ku-Tuna: Ingabe Le Nhlanzi Iphephile Ukudla?

-Delile

• Isingeniso
• Kungcoliswe Kangakanani?
• Amaleveli ezinhlotsheni ezihlukile
• Izilinganiso Zokukhomba Namazinga Aphephile
• Izingozi Zokuvezwa KweMercury
• Kufanele Udla Kaningi Kangakanani I-Tuna?
• Abanye Abantu Kufanele Bagweme I-Tuna
• Okusemqoka

Isingeniso

I-Tuna iyinhlanzi yasemanzini anosawoti edliwa emhlabeni wonke.

Kunomsoco omangalisayo futhi ungumthombo omuhle wamaprotheni, ama-omega-3 fatty acids namavithamini B. Noma kunjalo, ingaqukatha amazinga aphezulu e-mercury, insimbi esindayo enobuthi.

Izinqubo zemvelo - njengokuqhuma kwentaba-mlilo - kanye nemisebenzi yezimboni - njengokushisa kwamalahle - kukhipha imercury emkhathini noma ngqo olwandle, lapho iqala khona ukwakha impilo yasolwandle.

Ukuphuza i-mercury eningi kakhulu kuxhunyaniswe nezinkinga ezibucayi zezempilo, kuphakamisa ukukhathazeka ngokudla i-tuna njalo.

Lo mbhalo ubuyekeza i-mercury ku-tuna futhi ikutshele ukuthi kuphephile yini ukuyidla le nhlanzi.

Kungcoliswe Kangakanani?

I-tuna iqukethe i-mercury eningi kunezinye izinto zasolwandle ezidumile, kufaka phakathi i-salmon, i-oysters, i-lobster, i-scallops ne-tilapia ().

Lokhu kungenxa yokuthi i-tuna idla izinhlanzi ezincane esezivele zingcoliswe ngamanani ahlukahlukene e-mercury. Njengoba i-mercury ingakhishwa kalula, iyakha ezicubu ze-tuna ngokuhamba kwesikhathi (,).

Amaleveli ezinhlotsheni ezihlukile

Amaleveli e-mercury ezinhlanzini alinganiswa ngezingxenye ngesigidi (ppm) noma ama-micrograms (mcg). Nazi ezinye izinhlobo ze-tuna ezivamile kanye nokugxila kwe-mercury ():

Izilinganiso Zokukhomba Namazinga Aphephile

I-US Environmental Protection Agency (i-EPA) ithi i-0.045 mcg ye-mercury ngekhilogremu (0.1 mcg ngekg ngayinye) yesisindo somzimba ngosuku yisilinganiso esiphephile se-mercury. Leli nani laziwa njengomthamo wesethenjwa (4).

Umthamo wakho wansuku zonke we-mercury uncike esisindweni somzimba wakho. Ukuphindaphinda leyo nombolo ngesikhombisa kukunika umkhawulo wakho we-mercury wamasonto onke.

Nazi ezinye izibonelo zemithamo esetshenziswayo esuselwa kuzisindo zomzimba ezihlukile:

Njengoba ezinye izinhlobo ze-tuna ziphezulu kakhulu nge-mercury, i-3-ounce eyodwa (85-gram) eyodwa ingaba nokuhlungwa kwe-mercury okulingana noma okudlula umthamo wereferensi womuntu masonto onke.

I-tuna iphezulu nge-mercury uma iqhathaniswa nezinye izinhlanzi. Ukunikezwa okukodwa kwezinhlobo ezithile ze-tuna kungadlula inani eliphakeme le-mercury ongalidla ngokuphepha ngesonto.

Izingozi Zokuvezwa KweMercury

IMercury ku-tuna iyinkinga yezempilo ngenxa yezingozi ezihambisana nokuvezwa kwe-mercury.

Njengoba i-mercury yakhela ezicutshini zezinhlanzi ngokuhamba kwesikhathi, nayo inganqwabelana emzimbeni wakho. Ukuhlola ukuthi ingakanani i-mercury esemzimbeni wakho, udokotela angahlola ukugxila kwe-mercury ezinweleni nasegazini lakho.

Izinga eliphakeme lokuchayeka kwe-mercury lingaholela ekufeni kweseli lobuchopho futhi liholele kumakhono emoto angasebenzi kahle, inkumbulo nokugxila ().

Kwesinye isifundo kubantu abadala abayi-129, labo abanokugxila okuphezulu kakhulu kwe-mercury benze kabi kakhulu ekuhlolweni kwemoto, logic kanye nenkumbulo kunalabo ababenamazinga aphansi e-mercury ().

Ukuvezwa kweMercury nakho kungaholela ekukhathazekeni nasekucindezelekeni.

Ucwaningo olwenziwe kubantu abadala oludalulwe kwi-mercury emsebenzini luthole ukuthi babhekene nokudangala okukhulu nezimpawu zokukhathazeka futhi behamba kancane ekuqhubekeni kolwazi kunababambe iqhaza bokulawula ().

Ekugcineni, i-mercury buildup ixhunywe engcupheni ephezulu yesifo senhliziyo. Lokhu kungahle kube ngenxa yendima ye-mercury ku-oxydation ye-fat, inqubo engaholela kulokhu kugula ().

Ocwaningweni olwenziwe emadodeni angaphezu kwe-1,800, labo abadle izinhlanzi eziningi futhi abanokugxila okuphezulu kakhulu kwe-mercury babefana nokufa kabili ngenxa yesifo senhliziyo nesifo senhliziyo ().

Kodwa-ke, olunye ucwaningo lukhombisa ukuthi ukuvezwa kwe-mercury ephezulu akuhlotshaniswa nengozi eyengeziwe yesifo senhliziyo nokuthi izinzuzo zokudla izinhlanzi zempilo yenhliziyo zingadlula izingozi zokungenisa i-mercury ().

IMercury iyinsimbi esindayo engadala imiphumela emibi yezempilo. Ukugxila okuphezulu kwe-mercury kubantu kungadala izingqinamba zobuchopho, impilo engeyinhle yengqondo nesifo senhliziyo.

Kufanele Udla Kaningi Kangakanani I-Tuna?

I-tuna inomsoco omangalisayo futhi igcwele amaprotheni, amafutha anempilo namavithamini - kepha akufanele idliwe nsuku zonke.

I-FDA incoma ukuthi abantu abadala badle ama-ounces ama-3-5 (85-140 amagremu) ezinhlanzi ama-2-3 izikhathi ngesonto ukuthola ama-omega-3 fatty acids anele nezinye izakhamzimba eziwusizo ().

Kodwa-ke, ucwaningo lukhombisa ukuthi ukudla izinhlanzi njalo nge-mercury concentration engaphezu kwe-0.3 ppm kungakhuphula amazinga egazi e-mercury futhi kukhuthaze izindaba zezempilo. Izinhlobo eziningi ze-tuna zeqa leli nani (,).

Ngakho-ke, iningi labantu abadala kufanele lidle i-tuna ngokulinganisela futhi licabangele ukukhetha ezinye izinhlanzi eziphansi kakhulu kwi-mercury.

Lapho uthenga i-tuna, khetha uhlobo lwe-skipjack noma okusemathinini, olungafaki i-mercury eningi njenge-albacore noma i-bigeye.

Ungadla i-skipjack ne-tuna ekhanyayo ekheniwe eceleni kwezinye izinhlobo ze-mercury ephansi, njenge-cod, inkalankala, isalmon kanye ne-scallops, njengengxenye yokuphakanyiswa kwezinhlanzi okungu-2-3 ngesonto ().

Zama ukugwema ukudla i-albacore noma i-yellowfin tuna ngaphezu kwesisodwa ngesonto. Gwema i-bigeye tuna ngangokunokwenzeka ().

I-skipjack ne-tuna elula ekheniwe, ephansi nge-mercury, ingadliwa njengengxenye yokudla okunempilo. Kodwa-ke, i-albacore, i-yellowfin ne-bigeye tuna ziphezulu kwi-mercury futhi kufanele zikhawulelwe noma zigwenywe.

Abanye Abantu Kufanele Bagweme I-Tuna

Abantu abathile bathinteka kakhulu kwi-mercury futhi kufanele banciphise noma bagweme ngokuphelele i-tuna.

Lokhu kufaka phakathi izinsana, izingane ezincane nabesifazane abakhulelwe, ukuncelisa noma ukuhlela ukukhulelwa.

Ukuvezwa kweMercury kungathinta ukukhula kombungu futhi kungaholela ezingxabanweni zobuchopho nezentuthuko.

Ocwaningweni olwenziwe kwabesifazane abangama-135 nezinsana zabo, i-ppm ngayinye ye-mercury edliwe ngabesifazane abakhulelwe ibiboshwe ekwehleni kwamaphuzu angaphezu kwayisikhombisa ezikolweni zokuhlolwa kobuchopho bezinsana zabo ().

Kodwa-ke, ucwaningo luye lwabona ukuthi izinhlanzi ezinama-low-mercury zihlotshaniswa nezikolo ezingcono zobuchopho ().

Iziphathimandla zezempilo njengamanje zeluleka ukuthi izingane, abesifazane abakhulelwe kanye nomama abancelisayo kufanele banciphise ukungeniswa kwe-tuna nezinye izinhlanzi ze-mercury ephezulu, esikhundleni salokho bahlose ukunikezwa kwezinhlanzi ezi-3 kuya kwezinhlanu ze-mercury ngesonto (4,).

Izinsana, izingane nabesifazane abakhulelwe, abancelisayo noma abazama ukukhulelwa kufanele banciphise noma bagweme i-tuna. Kodwa-ke, bangazuza ngokudla izinhlanzi ezinama-mercury aphansi.

Okusemqoka

Ukuvezwa kweMercury kuxhumene nezinkinga zezempilo kubandakanya nokusebenza kabi kobuchopho, ukukhathazeka, ukudangala, isifo senhliziyo kanye nokukhula kwengane okungakhubazekile.

Yize i-tuna inomsoco kakhulu, ibuye ibe ne-mercury ephezulu uma iqhathaniswa nezinye izinhlanzi eziningi.

Ngakho-ke, kufanele idliwe ngokulinganisela - hhayi nsuku zonke.

Ungadla i-skipjack kanye ne-tuna elula ekheniwe kanye nezinye izinhlanzi ezinama-low-mercury izikhathi ezimbalwa ngesonto ngalinye, kepha kufanele ukhawulele noma ugweme i-albacore, i-yellowfin ne-bigeye tuna.