Iodine intake in healthy Japanese aged from 6 to 70 years residing in the same district

Endocrine journal

article

Yozen Fuse¹  Yoshiya Ito²  Nobu Tsukada³  Yoshimasa Shishiba¹  Minoru Irie¹ 

[1] Research Committee on Iodine Related Health Problems, Foundation for Growth Science;Division of Clinical Medicine, Japanese Red Cross Hokkaido College of Nursing;Kagawa Nutrition University, Institute of Nutrition Sciences

关键词: Iodine;    Iodine nutrition;    Urinary iodine excretion;    Dietary iodine intake;    Japanese;   

DOI  :  10.1507/endocrj.EJ21-0479

学科分类：内分泌与代谢学

来源: Japan Endocrine Society

【 摘 要 】

Iodine is an essential component of thyroid hormones and a dietary micronutrient for humans, and adequate iodine intake is necessary to maintain thyroid function. A population’s iodine intake and nutritional status are assessed based on urinary iodine excretion. There are few studies on iodine nutritional status for all age groups residing in the same area in Japan. Between 2010 and 2017, a total of 769 healthy subjects aged 6.4–73 years in three sites in Yokohama City, were enrolled in the survey. The urinary iodine concentration (UIC), iodine to creatinine (Cr) ratio (UI/Cr) and estimated 24-h urinary iodine excretion (UIE) in single spot urine samples were measured, and habitual dietary iodine intake was assessed by food frequency questionnaires. The estimated 24-h UIE was calculated using individual predicted 24-h creatinine excretion by the validated equations developed for healthy Japanese children and adults which vary by age, gender and anthropometry. The median UIC for all participants was 219 μg/L, suggesting adequate iodine intake for this population. There was an increasing trend in median UI/Cr and estimated 24-h UIE by age. A significant correlation between UIC and UI/Cr (r = 0.6378), UIC and estimated 24-h UIE (r = 0.6804), and UI/Cr and estimated 24-h UIE (r = 0.5756) were observed. These estimates can be feasible, convenient and alternative methods to 24-h urine collection in order to assess iodine status in some populations such as ethnically or racially homogeneous and well-nourished people. Additional studies are required to validate these findings.

【 授权许可】

Unknown