Nutrition
Selenium and Deiodinase Enzymes
Selenium and deiodinase enzymes help activate thyroid hormone—food sources beat megadoses, paired with adequate iodine for stable athlete energy.
Selenium and deiodinase enzymes: selenium supports enzymes that convert T4 to active T3 and protect thyroid tissue from oxidative stress. Brazil nuts, fish, eggs, and whole grains supply it—one or two Brazil nuts can meet daily needs in many regions.
Megadoses are toxic and unnecessary. Pair with adequate iodine; fixing one mineral without the other rarely solves fatigue.
Common questions
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How many Brazil nuts per day for selenium?
Often one to two nuts daily is enough in selenium-rich soil regions—more risks toxicity. Vary seafood and eggs instead of relying on nuts alone.
Related terms
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