November 5, 2024
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Updated values in the Food subsection, and Table 2: Iodine Content of Selected Foods, to reflect Release 4.0 of the USDA, FDA, and ODS-NIH Database for the Iodine Content of Common Foods. Also updated reference 8 accordingly.
May 1, 2024
Added a new section on low iodine diets for radioactive treatment to the Iodine and Health section. Also, added a statement to the Iodine Deficiency section to clarify that TSH concentration may remain within the normal range when iodine intake is low.
October 13, 2023
Updated values in the Food subsection, and Table 2: Iodine Content of Selected Foods, to reflect Release 3.0 of the USDA, FDA, and ODS-NIH Database for the Iodine Content of Common Foods. Also updated reference 8 accordingly.
August 10, 2023
Corrected reference numbering in the Fibrocystic breast disease and Radiation-induced thyroid cancer sections.
April 28, 2022
Added a second footnote to Table 2 that provides more information about the iodine content of bread. Also added text to the "Iodine Intakes and Status" section to clarify that describing the iodine status of the U.S. population is limited by the data.
March 1, 2022
Updated Table 2, Iodine Content of Selected Foods, and reference 8.
March 29, 2021
Linked to the new edition of the Dietary Guidelines for Americans and updated the associated text.
September 16, 2020
Updates were made throughout the fact sheet to reflect the recently released USDA, FDA, and ODS-NIH database of the iodine content of foods.
May 1, 2020
Added new references and modified or updated text throughout this fact sheet, particularly in the sections on iodized salt, groups at risk of iodine deficiency, and fetal and infant development.
March 31, 2020
Replaced the term “mental retardation” with “intellectual disability” in the Iodine Deficiency section.
March 11, 2020
Revised the description of iodine daily values.
July 9, 2019
Updated the link to USDA’s FoodData Central.
September 26, 2018
Added reference 13 to the footnote in Table 2 and made editorial changes.
March 2, 2018
Updated Dietary Reference Intake definitions.
