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Also reported in: mcmol/L, ng/mL
Your selenium is adequate for glutathione peroxidase activity, thyroid hormone conversion, and immune function.
Very low selenium can cause Keshan disease (a serious cardiomyopathy), noticeable immune dysfunction, and profound thyroid hormone conversion failure. Selenium is the cofactor for glutathione peroxidase — your most important internal antioxidant.
Seek medical care urgently. Selenium supplementation under supervision is needed. Identify the cause (noticeable malnutrition, parenteral nutrition without selenium, geographic deficiency).
Selenium: {{value}} {{unit}} — very low (ref: {{low}}–{{high}})Low selenium impairs T4-to-T3 thyroid hormone conversion, reduces glutathione peroxidase antioxidant activity, weakens immune defences, and may contribute to Hashimoto's thyroiditis progression. Selenium deficiency is common in areas with selenium-poor soil (parts of Europe, New Zealand, and China).
Eat 2–3 Brazil nuts daily (an excellent selenium source) or supplement with 100–200 mcg selenium (selenomethionine form). Retest in 3 months.
Selenium: {{value}} {{unit}} — below reference range (ref: {{low}}–{{high}})Borderline low selenium can subtly impair thyroid hormone conversion and reduce antioxidant protection. It may worsen Hashimoto's thyroiditis over time.
Add 1–2 Brazil nuts to your daily diet or take a selenium supplement (100–200 mcg/day). This is especially important if you have thyroid autoimmune disease.
Selenium: {{value}} {{unit}} — borderline lowYour selenium is adequate for glutathione peroxidase activity, thyroid hormone conversion, and immune function.
No action needed.
Selenium: {{value}} {{unit}} — within reference rangeYour selenium is in the healthy midrange, providing excellent antioxidant enzyme activity, optimal thyroid T4-to-T3 conversion, and robust immune function.
Excellent result. 1–2 Brazil nuts weekly maintains this level.
Selenium: {{value}} {{unit}} — optimalBorderline high selenium is typically from over-supplementation or eating many Brazil nuts daily. The margin between adequate and toxic selenium is relatively narrow compared to other minerals.
Reduce Brazil nut intake or selenium supplementation. No immediate concern at this level.
Selenium: {{value}} {{unit}} — borderline highHigh selenium (selenosis) may contribute to a garlic odor on the breath, hair loss, nail brittleness, fatigue, irritability, and GI distress. Chronic excess is associated with increased diabetes risk at very high levels.
Stop all selenium supplements. Eliminate Brazil nuts from your diet. Retest in 2–3 months. See your doctor if hair loss or nail changes are present.
Selenium: {{value}} {{unit}} — above reference range (ref: {{low}}–{{high}})Acute selenium toxicity may contribute to noticeable nausea, vomiting, abdominal pain, nerve damage, acute respiratory distress, and in very large cases, circulatory collapse and death. This is almost always from supplement overdose or industrial exposure.
Seek emergency medical care immediately. Stop all selenium sources. Supportive treatment is needed urgently.
Selenium: {{value}} {{unit}} — very high (ref: {{low}}–{{high}})Upload your lab report and get your actual values interpreted in plain English — instantly, with no medical training required.