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Effects of increased iodine intake on thyroid disorders
Xin Sun1, Zhongyan Shan1, Weiping Teng1
1Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, Shenyang, China.
Endocrinology and Metabolism (Seoul, Korea)
|October 14, 2014
Summary
Universal salt iodization (USI) effectively prevents iodine deficiency. However, this review examines the growing concerns of iodine excess and its health impacts, particularly in China.
Area of Science:
- Endocrinology
- Public Health
- Nutrition Science
Background:
- Iodine is vital for thyroid hormone synthesis.
- Iodine deficiency causes preventable mental impairment globally.
- Universal salt iodization (USI) is a strategy to combat deficiency.
Purpose of the Study:
- To review the global effects of iodine excess.
- To specifically analyze iodine excess in China.
- To highlight the relationship between USI and iodine excess.
Main Methods:
- Literature review of studies on iodine intake and thyroid health.
- Analysis of data on USI implementation and outcomes.
- Focus on populations susceptible to iodine excess.
Main Results:
- Iodine excess is an emerging concern linked to USI.
- Excess iodine can cause hypothyroidism and autoimmune thyroiditis.
- Vulnerable groups include the elderly, fetuses, and neonates.
Conclusions:
- While USI is effective for deficiency, iodine excess requires attention.
- Monitoring iodine intake is crucial, especially in regions with USI.
- Further research is needed on managing iodine excess in public health strategies.
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