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School-aged children and pregnant women are often target groups for epidemiological studies, but there is a lack of knowledge on the general adult population. The aim of this study was to assess the iodine status among a Portuguese public university staff as a proxy for the adult working population.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>The population study covered 103 adults within the iMC Salt randomized clinical trial, aged 24\u201369\u00a0years. Urinary iodine concentration was measured spectrophotometrically using the Sandell\u2013Kolthoff reaction. Iodine food intake was assessed using a 24-h dietary recall. The contribution of discretionary salt to the iodine daily intake was assessed through 24-h urinary sodium excretion (UIE) and potentiometric iodine determination of household salt.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>The mean urine volume in 24\u00a0h was 1.5 L. The median daily iodine intake estimated from 24-h UIE was 113\u00a0\u00b5g\/day, being lower among women (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05). Only 22% of participants showed iodine intake above the WHO-recommended cutoff (150\u00a0\u00b5g\/day). The median daily iodine intake estimated from the 24-h dietary recall was 58\u00a0\u00b5g\/day (51 and 68\u00a0\u00b5g\/day in women and men, respectively). Dairy, including yoghurt and milk products, were the primary dietary iodine\u00a0source (55%). Iodine intake estimated from 24-h UIE and 24-h dietary recall was moderately correlated (Spearman rank correlation coefficient <jats:italic>r<\/jats:italic>\u2009=\u20090.34, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05). The average iodine concentration in household salt was 14\u00a0mg I\/kg, with 45% of the samples below the minimum threshold preconized by WHO (15\u00a0mg I\/kg). The contribution of discretionary salt to the daily iodine intake was around 38%.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>This study contributes new knowledge about iodine status in Portuguese working adults. The results revealed moderate iodine deficiency, particularly in women. Public health strategies and monitoring programs are needed to ensure iodine adequacy in all population groups.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1007\/s00394-023-03149-1","type":"journal-article","created":{"date-parts":[[2023,4,20]],"date-time":"2023-04-20T18:42:41Z","timestamp":1682016161000},"page":"2245-2256","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Iodine intake assessment in the staff of a Porto region\u00a0university (Portugal): the iMC Salt trial"],"prefix":"10.1007","volume":"62","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0732-1571","authenticated-orcid":false,"given":"Ana","family":"Machado","sequence":"first","affiliation":[]},{"given":"Carla","family":"Gon\u00e7alves","sequence":"additional","affiliation":[]},{"given":"Pedro","family":"Moreira","sequence":"additional","affiliation":[]},{"given":"Ol\u00edvia","family":"Pinho","sequence":"additional","affiliation":[]},{"given":"Patr\u00edcia","family":"Padr\u00e3o","sequence":"additional","affiliation":[]},{"given":"T\u00e2nia","family":"Silva-Santos","sequence":"additional","affiliation":[]},{"given":"Micaela","family":"Rodrigues","sequence":"additional","affiliation":[]},{"given":"Pedro","family":"Norton","sequence":"additional","affiliation":[]},{"given":"Adriano A.","family":"Bordalo","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2023,4,20]]},"reference":[{"key":"3149_CR1","unstructured":"World Health Organization, United Nations Children\u2019s Fund, International Council for the Control of Iodine Deficiency Disorders (2007) Assessment of iodine deficiency disorders and monitoring their elimination, 3rd edn. 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