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Micronutrients

Selenium

Essential antioxidant trace element for proper thyroid function.

Definition

Selenium is an essential trace element integrated into selenoproteins, major antioxidant enzymes. It protects cells from oxidative stress and modulates thyroid and immune function.

How it works

Selenium is the cofactor for glutathione peroxidases and thioredoxin reductases, key antioxidant enzymes. It is essential for the conversion of T4 to T3 (active thyroid hormones). European soils are depleted of selenium, resulting in frequent deficiencies.

Role

Antioxidant protection, thyroid function, immunity, prevention of certain cancers.

Examples

  • Brazil nuts (1917µg/100g — 1 nut is sufficient)
  • Tuna (80µg)
  • Meat (20-30µg)
  • Whole grains

Recommendations

RDA: 70µg/day. One Brazil nut per day covers daily needs. Do not exceed 400µg/day (risk of toxicity).

Key takeaway

One Brazil nut per day covers the daily recommended intake of selenium.

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