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Iodine supplementation remains one of the most debated topics in thyroid health. Some practitioners warn that iodine, especially higher-dose forms such as Lugol’s iodine, may trigger thyroid dysfunction, Hashimoto’s, or hyperthyroidism, while others argue that iodine deficiency is widespread and often overlooked. In this episode, Judy Cho examines the Wolff–Chaikoff effect, iodine’s role beyond the thyroid, and why iodized salt may not provide enough iodine for optimal health.

The deeper history raises an even more important question: are we blaming supplemental iodine while ignoring other exposures that may have affected thyroid health for generations? Judy explores radioactive iodine, nuclear fallout, contaminated food supplies, and the historical events that may have shaped today’s fear around iodine. She also explains why the distinction between nutritional iodine and radioactive iodine matters before deciding whether iodine is helpful or harmful.

• Is iodine dangerous for your thyroid?
• The Wolff–Chaikoff effect explained
• Iodine deficiency, bromide, fluoride, and chloride
• The forgotten history of radioactive iodine exposure
• What government research found about thyroid risk
• Radioactive iodine exposure
• Understanding the difference between supplemental iodine vs. radioactive iodine

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EPISODE REFERENCES

• Thyroid Dose and Risk Calculator for Nuclear Weapons Fallout for the US Population
• Exposure of the American People to Iodine-131 from Nevada Nuclear-Bomb Tests
• CDC Fallout Study Table of Contents
• Chapter 8 of CDC Results US Before and After exposure
• How to Take Iodine Episodes 
• Lynne Farrow Interview
• Iodine Episodes
• Free Iodine Guide 

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*DISCLAIMER: This content is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. It should not replace professional medical advice.