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Reflection of Dietary Iodine in the 24 h Urinary Iodine Concentration, Serum Iodine and Thyroglobulin as Biomarkers of Iodine Status: A Pilot Study

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dc.creator Hlucny, Katelyn
dc.creator Alexander, Brenda M.
dc.creator Gerow, Kenneth G.
dc.creator Larson-Meyer, D. Enette
dc.date 2021-08-09T16:55:28Z
dc.date 2021-08-09T16:55:28Z
dc.date 2021-07-23
dc.date 2021-08-06T15:19:04Z
dc.date.accessioned 2023-03-01T18:54:17Z
dc.date.available 2023-03-01T18:54:17Z
dc.identifier Hlucny, K.; Alexander, B.M.; Gerow, K.; Larson-Meyer, D.E. Reflection of Dietary Iodine in the 24 h Urinary Iodine Concentration, Serum Iodine and Thyroglobulin as Biomarkers of Iodine Status: A Pilot Study. Nutrients 2021, 13, 2520.
dc.identifier http://hdl.handle.net/10919/104615
dc.identifier https://doi.org/10.3390/nu13082520
dc.identifier.uri http://localhost:8080/xmlui/handle/CUHPOERS/281814
dc.description Background: The iodine status of the US population is considered adequate, but subpopulations remain at risk for iodine deficiency and a biomarker of individual iodine status has yet to be determined. The purpose of this study was to determine whether a 3 day titration diet, providing known quantities of iodized salt, is reflected in 24 h urinary iodine concentration (UIC), serum iodine, and thyroglobulin (Tg). Methods: A total of 10 participants (31.3 ± 4.0 years, 76.1 ± 6.3 kg) completed three, 3 day iodine titration diets (minimal iodine, US RDA, (United States Recommended Daily Allowance), and 3× RDA). The 24 h UIC, serum iodine, and Tg were measured following each diet. The 24 h UIC and an iodine-specific food frequency questionnaire (FFQ) were completed at baseline. Results: UIC increased an average of 19.3 μg/L for every gram of iodized salt consumed and was different from minimal to RDA (<i>p</i> = 0.001) and RDA to 3× RDA diets (<i>p</i> = 0.04). Serum iodine was different from RDA to 3× RDA (<i>p</i> = 0.006) whereas Tg was not responsive to diet. Baseline UIC was associated with iodine intake from milk (r = 0.688, <i>p</i> = 0.028) and fish/seafood (r = 0.646, <i>p</i> = 0.043). Conclusion: These results suggest that 24 h UIC and serum iodine may be reflective of individual iodine status and may serve as biomarkers of iodine status.
dc.description Published version
dc.format application/pdf
dc.format application/pdf
dc.language en
dc.publisher MDPI
dc.rights Creative Commons Attribution 4.0 International
dc.rights http://creativecommons.org/licenses/by/4.0/
dc.subject iodine status
dc.subject biomarkers
dc.subject validation
dc.subject nutritional exposure
dc.subject dietary biomarkers
dc.subject iodine intake
dc.subject urinary iodine concentration
dc.subject serum iodine
dc.subject thyroglobulin
dc.subject food frequency questionnaire
dc.subject dairy products
dc.title Reflection of Dietary Iodine in the 24 h Urinary Iodine Concentration, Serum Iodine and Thyroglobulin as Biomarkers of Iodine Status: A Pilot Study
dc.title Nutrients
dc.type Article - Refereed
dc.type Text


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