Published: 2026-03-24
Updated: 2026-03-24
Editorial note
Map of Health content is prepared with an evidence-based approach. References are provided for transparency.
Medical disclaimer
This content is for informational purposes only and does not replace professional medical advice, diagnosis, or treatment. If you have an urgent medical concern, seek immediate care.
"Iodine is an essential mineral that the human body cannot produce on its own but acts as a "fuel" for vital functions. It plays a leading role in many processes, from synthesizing thyroid hormones to regulating metabolic rate and ensuring fetal brain development."
Key Roles of Iodine in the Body
Iodine enables the thyroid gland to produce T3 and T4 hormones. These hormones are responsible for:
Regulating Metabolism: Controlling how fast the body burns energy.
Supporting Cognitive Development: It is critical for the formation of the baby’s brain and nervous system during pregnancy.
Cellular Repair: Assisting in the regeneration speed of cells.
How Much Iodine Do We Need Daily?
According to World Health Organization (WHO) data, an average adult needs 150 micrograms of iodine daily. However, this requirement increases to 250 micrograms for pregnant women and remains high for breastfeeding mothers. Deficiency can lead to hypothyroidism, characterized by fatigue, dry skin, constipation, and extreme sensitivity to cold.
Best Dietary Sources of Iodine
Due to the depletion of iodine in soil, plant-based sources can sometimes be insufficient. The most potent sources include:
Seafood: Cod, crab, shrimp, and haddock.
Dairy Products: Yogurt, cheese, and iodine-fortified milks.
Eggs: A significant natural source of iodine.
Iodized Salt: Using iodine-enriched salt is the most practical way to meet daily needs.
