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Also reported in: mcg/g creatinine
Your urine iodine excretion is in the adequate range, indicating sufficient iodine intake for thyroid hormone synthesis and general metabolic function.
Very low urine iodine indicates noticeable iodine deficiency — the most common preventable cause of intellectual disability worldwide. The thyroid cannot make hormones without iodine, leading to profound hypothyroidism, goiter (enlarged thyroid), and in pregnancy, irreversible developmental damage to the unborn baby.
Seek urgent medical care. Iodine supplementation and thyroid function evaluation are needed immediately. This is especially critical in pregnancy.
Urine Iodine: {{value}} {{unit}} — very low (ref: {{low}}–{{high}})Urine iodine below 100 mcg/L indicates iodine deficiency. Iodine is the essential raw material for thyroid hormone synthesis — without enough, the thyroid cannot function properly. Deficiency may contribute to fatigue, weight gain, goiter, and cognitive impairment.
Increase iodine intake through iodized salt, seaweed, seafood, and dairy. Consider an iodine supplement (150–220 mcg/day for adults; more for pregnant/breastfeeding women). Have thyroid function (TSH (the signal hormone your brain sends to your thyroid), T4) checked.
Urine Iodine: {{value}} {{unit}} — below reference range (<100 mcg/L)Borderline low urine iodine suggests marginal iodine sufficiency. The thyroid may be producing enough hormones now, but is working harder to do so — and prolonged marginal deficiency can lead to goiter over time.
Ensure regular intake of iodine-rich foods (iodized salt, seafood, dairy). If vegetarian or vegan, iodine supplementation is often needed.
Urine Iodine: {{value}} {{unit}} — borderline lowYour urine iodine excretion is in the adequate range, indicating sufficient iodine intake for thyroid hormone synthesis and general metabolic function.
No action needed. Continue regular iodine-containing foods.
Urine Iodine: {{value}} {{unit}} — within reference range (100–300 mcg/L)Your urine iodine indicates excellent iodine sufficiency, providing the thyroid with optimal raw material for hormone synthesis.
Excellent result. No action needed.
Urine Iodine: {{value}} {{unit}} — optimal (100–250 mcg/L)Borderline high urine iodine reflects excess dietary iodine — often from seaweed, iodine supplements, or iodine-containing medications. In susceptible individuals, excess iodine can paradoxically suppress thyroid function or trigger autoimmune thyroiditis.
Reduce iodine supplement dosing if using any. Limit very high seaweed intake. No urgent concern for most people.
Urine Iodine: {{value}} {{unit}} — borderline high (300–500 mcg/L)High iodine intake can suppress thyroid function (Wolff-Chaikoff effect) or trigger hyperthyroidism in nodular goiters (Jod-Basedow effect). It can also worsen or trigger Hashimoto's thyroiditis in genetically susceptible individuals.
Reduce iodine-containing supplements and high-iodine foods (kelp, nori). Have thyroid function (TSH (the signal hormone your brain sends to your thyroid), free T4 (the main thyroid hormone in your blood)) checked.
Urine Iodine: {{value}} {{unit}} — above reference range (>500 mcg/L)Very high iodine excretion indicates massive iodine excess — often from amiodarone (heart medication), IV contrast agents, or iodine supplement overdose. Both hypothyroidism and hyperthyroidism can be triggered at this level.
Seek medical care. Check thyroid function urgently. If taking amiodarone or you recently had an iodine contrast scan, notify your doctor about this result.
Urine Iodine: {{value}} {{unit}} — very high (>1000 mcg/L)Upload your lab report and get your actual values interpreted in plain English — instantly, with no medical training required.