Iodine

minerals

★★★★★

Iodine is an essential trace mineral critical for thyroid hormone synthesis and metabolic regulation. It is required for proper cognitive development, energy production, and maintaining healthy thyroid function throughout life.

Benefits

✓Supports thyroid hormone production and function

✓Essential for cognitive development and brain health

✓Promotes healthy metabolic rate and energy levels

✓Supports reproductive health and foetal development

✓Aids immune system function and antioxidant defence

Dosage

Typical Dose

150 micrograms daily for adults

Upper Limit

1,100 micrograms daily

Timing

With meals to enhance absorption

Forms & Bioavailability

Potassium iodide

Highly bioavailable and commonly used in fortified foods and supplements

Sodium iodide

Well-absorbed form with similar efficacy to potassium iodide

Kelp and seaweed

Natural source with variable iodine content; absorption varies

Side Effects

⚠Excessive intake may cause iodism (metallic taste, swelling of salivary glands)

⚠May worsen acne in sensitive individuals

⚠Can trigger or exacerbate autoimmune thyroid conditions at high doses

Interactions

⚡May interact with certain thyroid medications; take separately

⚡Cruciferous vegetables may reduce iodine absorption when consumed in excess

⚡Lithium may reduce iodine uptake by the thyroid

Research Summary

Iodine is well-established as essential for thyroid hormone synthesis (T3 and T4) and cognitive development, with substantial WHO and NHS support for adequate intake. Clinical evidence demonstrates that deficiency causes goitre, hypothyroidism, and impaired neurodevelopment, whilst adequate intake prevents these conditions. Research confirms that supplementation is effective for populations at risk of deficiency, particularly in regions without iodised salt programmes.

Compare Iodine with...

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Disclaimer: This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement, especially if you have existing health conditions or take medication.