Selen til stofskiftet og skjoldbruskkirtel

Selen til stofskiftet og skjoldbruskkirtel

Skjoldbruskkirtlens hormoner stimulerer cellernes iltoptagelse, og det medfører en direkte påvirkning af stofskiftet. Det antages, at over en halv million danskere har problemer med denne del af stofskiftet, ofte uden at vide det. Og mange i medicinsk behandling har det stadig dårligt.

Sporstoffet selen aktiverer stofskiftehormonerne

Skjoldbruskkirtlen producerer to forskellige stofskiftehormoner. T3 med 3 jodatomerer er det aktive, og T4 med 4 jodatomer er det passive. Når stofskiftet skal aktiveres ude i kroppens væv, sørger en selenholdig forbindelse for at fjerne et jodatom fra T4, så det omdannes til det aktive T3 - alt efter kroppens behov. Andre selenforbindelser fungerer som vigtige antioxidanter, der beskytter skjoldbruskkirtlen mod inflammationer forårsaget af oxidativ stress fra kviksølv, infektioner, medicin, tobaksrøg og andre kilder til frie radikaler.
Der kan være mange årsager til stofskiftesygdomme, og inflammationer spiller en væsentlig rolle ved de mest udbredte former.

Tilskud med selen kan hjælpe på stofskiftesygdomme

Tilskud med 200 mikrogram selen har vist en positiv effekt på de inflammationer, der optræder ved Hashimotos sygdom, der giver for lavt stofskifte, samt Graves sygdom, der giver forhøjet stofskifte.
Hos gravide har tilskud med selen ligeledes sænket niveauet af såkaldte anti-TPO antistoffer, som ofte er forstadie til Hashimotos sygdom.
Der har hidtil været et snævert fokus på jod i forbindelse med skjoldbruskkirtlens funktion, men selen spiller også en afgørende rolle på flere fronter.

Hvordan får vi nok selen?

Den danske jord er ret fattig på selen, og de bedste kilder er fisk, skaldyr, indmad og paranødder. Danskernes gennemsnitlige selenindtag ligger under ADT og er faldet inden for de sidste årtier - især på grund af ændrede spisevaner og udpining af jorden.
Mange vil derfor have glæde af et selentilskud, hvor organisk selengær giver den største lighed med selenvariationen i selenrig kost.

Symptomer på for lavt stofskifte

Træthed og koncentrationsbesvær, kuldskærhed, langsom puls, vægtstigning, opsvulmet hals/hoved, slap, tør hud, hårtab og flossede negle, forstoppelse, tendens til depression, struma (forstørret skjoldbruskkirtel)

 

Symptomer på forhøjet stofskifte

Træthed og koncentrationsbesvær, varmefornemmelse og svedtendens, hurtig puls og hjertebanken, vægttab trods ulvehunger, hyppig og løs afføring, nervøsitet, struma (forstørret skjoldbruskkirtel) samt fremtrædende øjeæbler ved Graves sygdom.

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