Iodine

Also known as: Potassium Iodide, Sodium Iodide, Kelp, Iodine Supplement

MineralsTabletNatural Source

Iodine is an essential trace mineral critical for synthesizing thyroid hormones that regulate metabolism, growth, and development. It is vital for proper brain development in infants and children. Iodine deficiency is the leading preventable cause of intellectual disability worldwide.

Benefits

Essential for proper thyroid function and metabolism. Critical for brain development and cognitive function in children. Supports healthy growth and development. Important for energy production and temperature regulation. Supports nervous system function. May help prevent goiter. Important for reproductive health and fetal development.

Recommended Dosage

RDA: 150 mcg/day for adults. Pregnant women: 220 mcg/day. Breastfeeding: 290 mcg/day. Common supplement doses: 75–150 mcg daily. Upper limit: 1,100 mcg/day from all sources. Iodized salt provides about 75 mcg per teaspoon. Take with food for better absorption.

Food Sources

Seaweed and kelp (variable iodine content), iodized salt, dairy products, eggs, fish, shellfish, whole grains, potatoes, cranberries, prunes, spinach, broccoli.

Side Effects

Well-tolerated at recommended doses. Excessive iodine (above 1,100 mcg) causes: iodine sensitivity reactions, hypothyroidism, goiter. High intakes may cause: metallic taste, nausea, salivary gland swelling, skin reactions. Iodism possible with chronic excess.

Interactions

Lithium reduces iodine absorption and increases hypothyroidism risk. Propylthiouracil and methimazole should not be combined with high-dose iodine. May reduce effectiveness of some thyroid medications. Amiodarone contains high iodine — monitor carefully.

Warnings

Those with thyroid disease should consult doctor before supplementing (may worsen condition). Iodine sensitivity or allergy requires avoidance. High seaweed consumption may provide excessive iodine. Those on lithium should monitor carefully. Pregnant women need adequate intake but avoid excess.

Deficiency Symptoms

Goiter (enlarged thyroid gland). Hypothyroidism with fatigue and weight gain. Poor cognitive development in children. Cretinism in severe cases (intellectual disability, deaf-mutism). Poor growth and development. Dry skin and hair loss.

Frequently Asked Questions

What are the benefits of Iodine?▼

What is the recommended dosage for Iodine?▼

What foods contain Iodine?▼

Seaweed and kelp (variable iodine content), iodized salt, dairy products, eggs, fish, shellfish, whole grains, potatoes, cranberries, prunes, spinach, broccoli.

What are the side effects of Iodine?▼

What are the symptoms of Iodine deficiency?▼

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Supplement Disclaimer

This supplement information is for educational purposes only and should not replace professional medical advice. Dietary supplements are not intended to diagnose, treat, cure, or prevent any disease. Always consult with a healthcare provider before starting any supplement, especially if you are pregnant, nursing, taking medications, or have a medical condition.