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[Urinary iodide excretion in Japanese people and thyroid dysfunction].
Y Ishizuki1, Y Hirooka, Y Murata
1Fourth Department of Internal Medicine, Aichi Medical University.
Summary
Japanese dietary iodine intake is approximately 470 micrograms/day. Urinary iodine excretion is influenced by both iodine intake and thyroid function, particularly in hypothyroidism.
Area of Science:
- Endocrinology
- Nutritional Science
Context:
- Assessing Japanese dietary iodine intake is crucial for public health.
- Thyroid function can impact iodine metabolism and excretion.
Purpose:
- To estimate Japanese dietary iodine intake.
- To investigate the influence of thyroid function on urinary iodine excretion.
Summary:
- This study estimated Japanese dietary iodine intake at approximately 470 micrograms/day based on urinary iodine excretion.
- Urinary iodine levels correlated with serum inorganic iodide in healthy controls and chronic thyroiditis (CT) patients.
- Hypothyroidism showed significantly depressed urinary iodine and serum inorganic iodide ratios compared to CT patients.
Impact:
- Provides an estimate of iodine intake in Japan.
- Highlights the interplay between dietary iodine, thyroid status, and urinary iodine excretion.
- Suggests thyroid function is a significant factor in interpreting urinary iodine as a biomarker for iodine intake.