Korean Journal of Community Nutrition

Research Article

[English]
Estimation of Dietary Iodine Intake of Koreans through a Total Diet Study (TDS): Jeeyeon Lee, Yoonjae Yeoh, Min Jeong Seo, Gae Ho Lee, Cho-il Kim; Korean J Community Nutr 2021;26(1):48-55. Published online February 28, 2021; DOI: https://doi.org/10.5720/kjcn.2021.26.1.48

Objectives
This study was conducted to estimate the dietary iodine intake of Koreans by a Total Diet Study (TDS) which provides ‘closer-to-real’ estimates of exposure to hazardous materials and nutrients through an analysis of table-ready (cooked) samples of foods. Methods: Dietary intake data from 2013-2017 Korea National Health and Nutrition Examination Survey (KNHANES) was used to select representative foods (RFs) for iodine analysis. A total of 115 RFs were selected and 158 ‘RF × cooking method-combination’ pairs were derived by pairing each RF to corresponding cooking method(s) used more frequently. RFs were collected from 9 mega-markets in 9 metropolitan cities nationwide and mixed into composites prior to cooking preparation to a ‘table ready’ state for iodine analysis by inductively coupled plasma mass spectrometry. Iodine intake of Koreans was estimated based on the food intake data of the 2016-2018 KNHANES. Results: High iodine content was detected in seaweeds such as sea mustard and kelp. The mean iodine intake/capita/day was 418.4 ㎍ and the median value was 129.0 ㎍. Seaweeds contributed to 77.4% of the total iodine intake and the contribution by food item was as follows: sea mustard (44.0%), kelp (20.4%), laver (13.1%), milk (3.9%), egg (3.5%). Compared to the Dietary Reference Intakes for Koreans 2020, the proportion of people with iodine intake exceeding the tolerable upper intake level or below the estimated average requirement was high in the physiologically vulnerable groups (infants, children, pregnant women, and lactating women). Conclusions: The results, drawn from a TDS, are regarded closer to real estimates for iodine intake of Koreans compared with values in existing literature, which were based on a very limited variety of foods. On the other hand, it seems necessary to seek out solutions for the problematic iodine intake among physiologically vulnerable groups through in-depth analyses on food intake data collected with significant scale & quality.

Citations

Citations to this article as recorded by

Iodine intake from brown seaweed and the related nutritional risk assessment in Koreans
Sung Ok Kwon, Kwang-Il Kwon, Mi-Young Lee, Hye Young Lee, Cho-il Kim
Nutrition Research and Practice.2024; 18(3): 412. CrossRef
High intakes of iodine among women during pregnancy and the postpartum period has no adverse effect on thyroid function
Dal Lae Ju, Sun Wook Cho, Chae Won Chung, Young Ah Lee, Gi Jeong Cheon, Young Joo Park, Choong Ho Shin, Jong Kwan Jun, June-Key Chung, Sue K. Park, YoonJu Song
European Journal of Nutrition.2023; 62(1): 239. CrossRef
Interactions between Polygenetic Variants and Lifestyle Factors in Hypothyroidism: A Hospital-Based Cohort Study
Da Sol Kim, Sunmin Park
Nutrients.2023; 15(17): 3850. CrossRef
Dietary sodium and potassium intake of Koreans estimated using 2 different sources of their contents in foods, Food & Nutrient Database and the Korean Total Diet Study: a comparative study
Jee Yeon Lee, Sung Ok Kwon, Soo Hyun Lee, Min Jeong Seo, Gae Ho Lee, Cho-il Kim
Korean Journal of Community Nutrition.2023; 28(3): 235. CrossRef
Dietary Iron Intake of Koreans Estimated using 2 Different Sources of Iron Contents are Comparable: Food & Nutrient Database and Iron Contents of Cooked Foods in the Korean Total Diet Study
Jeeyeon Lee, Sung Ok Kwon, Yoonjae Yeoh, Min Jeong Seo, Gae Ho Lee, Cho-il Kim
Korean Journal of Community Nutrition.2022; 27(3): 245. CrossRef
Effect of iodine restriction on short-term changes in thyroid function in patients with subclinical hypothyroidism
Obin Kwon, Dong Yeob Shin, Eun Jig Lee
Journal of Nutrition and Health.2022; 55(2): 250. CrossRef

180 View
7 Download
6 Crossref

First
Prev
Page of 1
Next
Last

Search