| Not Yet Recruiting | Effect of Iodine-containing Multiple Micronutrient During Lactation on Infant Neurodevelopment NCT05901766 | Brown University | Phase 4 |
| Recruiting | The Next Step Towards the Elimination of Iodine Deficiency and Preventable Iodine-related Disorders in Europe NCT06801691 | EUthyroid | N/A |
| Recruiting | EUthyroid2: the Next Step Towards the Elimination of Iodine Deficiency and Preventable Iodine-related Disorder NCT06769009 | EUthyroid | N/A |
| Active Not Recruiting | The Bioavailability of Iodine in Plant-based Milk Alternatives NCT06775795 | University of Surrey | N/A |
| Completed | Acceptability and Nutritional Impact of Double-fortified Salt Containing Iodine and Folic Acid NCT06223854 | University of California, Davis | N/A |
| Unknown | Jodkids: a Study of Iodine Intake Among Children Aged 2-10 Years NCT06234982 | DTU National Food Institute | — |
| Completed | Acceptability and Nutritional Impact of Double-fortified Salt Containing Iodine and Folic Acid - Phase 1 NCT05792241 | University of California, Davis | — |
| Completed | Iodine Status of the Indigenous Peoples (Karen) Living in Thailand NCT05920603 | Mahidol University | — |
| Completed | Assessment of the Daily Average Requirement of Iodine in Lactating Women NCT05382793 | University Children's Hospital, Zurich | N/A |
| Unknown | Prevalence of Iodine Deficiency in Remote Communities of Haiti NCT05275452 | Swiss Federal Institute of Technology | — |
| Completed | Effect of Iodine Deficiency on Periodontitis NCT05724251 | Ataturk University | — |
| Completed | Strategies to Improve Iodine Status in Early Pregnancy NCT05170997 | Queen's University, Belfast | N/A |
| Completed | Comparison of I-FFQ and Two Reference Methods NCT05934006 | University of Bergen | — |
| Completed | Iodine Status After Intake of Sushi and Seaweed Salad NCT05773456 | University of Bergen | N/A |
| Completed | Nutritional Status and Iodized Salt Use Among School-aged Children NCT05862376 | Mahidol University | — |
| Completed | Normal Range of TSH and FT4 in Pregnancy NCT04860622 | Sehit Prof. Dr. Ilhan Varank Sancaktepe Training and Research Hospital | — |
| Active Not Recruiting | Iodine Impact on Thyroid Function and Psychomotor Development, Observational Study in the Portuguese Minho Reg NCT04288531 | University of Minho | — |
| Completed | Variability of Daily Iodine Intake: The Effects of Intra- and Inter-individual Variability in Iodine Nutrition NCT03731312 | Swiss Federal Institute of Technology | — |
| Completed | Estimating Usual Iodine Intake From Spot Urinary Iodine Concentrations NCT03602404 | Swiss Federal Institute of Technology | — |
| Completed | Iodine Status Monitoring in PortUguese Pregnant woMen: Impact of Supplementation NCT04010708 | Universidade do Porto | — |
| Completed | Seaweed Iodine Delivered Via Food or Supplementation NCT04875377 | University of Glasgow | N/A |
| Unknown | Potential Preventive Effect of Selenium on Iodine-induced Thyroid Autoimmunity During Pregnancy NCT03377218 | Riga Stradins University | N/A |
| Completed | Caribbean Island Urinary Iodine Survey 2018 NCT04388540 | Swiss Federal Institute of Technology | — |
| Completed | Assessment of Dried Blood Spot Thyroglobulin and Urinary Iodine Concentration in Pregnant Women NCT03176706 | Swiss Federal Institute of Technology | — |
| Completed | Climat Impact on Urinary Iodine Concentration NCT03215680 | Swiss Federal Institute of Technology | — |
| Completed | Iodine Supplement Strategies Between Routine Iodine Supplementation and Selective Iodine Supplementation NCT03078140 | Chiang Mai University | N/A |
| Completed | Nutrition & Food Choices in Early Pregnancy NCT05685056 | University of Glasgow | N/A |
| Completed | Iodine Nutrition During Pregnancy and Related Neonatal Physical Development NCT02586220 | qingya tang | — |
| Completed | Vitamin D, Iodine, and Lead Levels in Haitian Infants and Children. NCT02301520 | Boston Children's Hospital | — |
| Completed | An Iodine Balance Experiment NCT03279315 | Tianjin Medical University | N/A |
| Completed | Iodine Status of Preschoolers Given Micronutrient Powder for 6 Months NCT02280330 | Nutrition Center of the Philippines | Phase 4 |
| Completed | Thyroid Disorders in Malaysia: A Nationwide Multicentre Study NCT02190214 | International Islamic University Malaysia | — |
| Completed | Salt Iodization: Meeting the Needs of Pregnancy, Lactation and Infancy NCT02196337 | Swiss Federal Institute of Technology | — |
| Completed | Iodine Supplementation in Obesity NCT01985204 | Swiss Federal Institute of Technology | N/A |
| Completed | The Effects of Iodized Salt on Cognitive Development in Ethiopia NCT01349634 | McGill University | N/A |
| Completed | Study of the Effect of Iodized Oil Supplementation During Infancy NCT01126125 | Swiss Federal Institute of Technology | N/A |
| Completed | Iodine Supplementation During Pregnancy and Neuropsychological Development NCT01049659 | Centre Hospitalier Universitaire de Nice | N/A |
| Withdrawn | Group Education to Improve the Iodine Nutrition in Pregnancy: Cluster Randomized Trial NCT01301768 | Fundacio d'Investigacio en Atencio Primaria Jordi Gol i Gurina | N/A |
| Completed | Maternal Iodine Supplementation and Effects on Thyroid Function and Child Development NCT00791466 | Wageningen University | N/A |
| Unknown | Iodine Status in Pregnant Women and Their Newborns: is Congenital Hypothyroidism Related to Iodine Deficiency NCT00505479 | Zhejiang University | — |