Minerals

Iodine Test

Iodine is vital for thyroid health and becomes especially important during pregnancy and breastfeeding. Monitoring supports healthy hormone production throughout your reproductive years.

Doctor's Assessment Included

Iodine: what this test measures

This test measures the level of iodine in your blood or urine. It helps assess your iodine nutritional status and thyroid function support.

Iodine: why this value matters

Iodine is essential for thyroid hormone production, which controls metabolism. Deficiency may lead to thyroid enlargement (goitre) and can affect cognitive development. Excess iodine can also disrupt thyroid function. Consult your healthcare provider for guidance.

Iodine: how the blood test works

Referral: No GP referral needed. After the order we arrange the referral through ZorgDomein, within one business day; orders after 17:00 or at the weekend start on the next business day. ZorgDomein emails a barcode, and that barcode is what the draw site needs.
The draw: A blood draw from a vein in the arm, at a partner laboratory's draw site. No home kit, no finger prick.
Where: 650+ draw sites run by independent laboratories across the Netherlands. Draw sites

Iodine: when is testing worthwhile?

Testing may be recommended if you have thyroid symptoms, follow a restricted diet (especially vegan or low-salt), are pregnant or planning pregnancy, or live in an iodine-deficient region.

Iodine: symptoms of a high or low value

Low Levels

Symptoms of iodine deficiency may include fatigue, weight gain, feeling cold, dry skin, hair thinning, and thyroid enlargement (goitre). Severe deficiency during pregnancy can affect fetal development.

High Levels

Excess iodine may cause thyroid inflammation, hyperthyroidism, or paradoxically hypothyroidism. Symptoms may include rapid heart rate, anxiety, weight changes, and thyroid tenderness.

Iodine: lifestyle and this value

Use iodised salt in cooking and include iodine-rich foods such as seafood, dairy products, and eggs in your diet. If you follow a vegan diet, consider discussing iodine supplementation with your healthcare provider.

Iodine: frequently asked questions

Is iodine deficiency common?

Iodine deficiency remains a concern in some regions and populations, particularly those with limited access to iodised salt or seafood. Your healthcare provider can assess your risk.

Can too much iodine be harmful?

Yes, excessive iodine intake can disrupt thyroid function. It is important to maintain balanced intake and consult your healthcare provider before supplementing.

Do I need iodine supplements during pregnancy?

Iodine needs increase during pregnancy for fetal brain development. Discuss supplementation with your healthcare provider, as they can recommend the appropriate amount.

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Tests with related values

These panels measure values from the same category as this marker.

Metabolism

Complete Metabolic Panel

Comprehensive metabolic panel: electrolytes, kidney, liver, glucose, HbA1c, and protein.

HbA1c (Glycated Hemoglobin) ALT (Alanine Aminotransferase) Calcium ALP (Alkaline Phosphatase) AST (Aspartate Aminotransferase) Bilirubin (Total) Urea (BUN) Creatinine eGFR (Estimated Glomerular Filtration Rate) Glucose (Fasting) Bicarbonate Chloride Sodium Potassium Albumin Total Protein Bilirubin (Direct) Bilirubin (Indirect)

€149,-

Iron