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Selenium
Essential for glutathione peroxidase and thyroid function
Also known as: Se,Serum Selenium
Reference Ranges
Clinical Reference
70.0 – 150.0 μg/L
Optimal Range
90.0 – 130.0 μg/L
Varies by geographic region
Related Conditions
Immune Deficiency
Low
Hypothyroidism
Low
Food & Lifestyle Recommendations
🍎 Food
Eat 2-3 Brazil nuts per day — they provide the entire daily selenium requirement (~55-190 mcg)
One Brazil nut contains 68-91 mcg selenium
Evidence-Backed Supplements
When Low
-
Direct supplementation; selenomethionine form preferred
Selenomethionine 100–200 mcg/day Morning
Questions to Ask Your Doctor
- Could my selenium level be affecting my thyroid function? Selenium is essential for deiodinase enzymes (T4→T3)
Upload your blood test to see how your Selenium compares to reference and optimal ranges.
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