Iodine intake (school children)


Median UIC <100 μg/L


Median UIC 100-299 μg/L


Median UIC ≥300 μg/L
National data
Sub-national data
No recent data

A partnership to gather and maintain data

Understanding the scope of iodine deficiency and its causes is key to keeping the problem at bay and protecting the developing brains of children.  IGN compiles country data on iodine status and presents the most recent UIC study for each country in the IGN’s Global Iodine Scorecard. We work with the World Health Organization (WHO) to integrate the data into WHO’s Vitamin and Mineral Nutrition Information System (VMNIS), an open-access database that compiles data on micronutrient status of populations around the world. The VMNIS includes studies that are representative at the national level and first administrative level and displays disaggregated data, for example UIC by region.

The organizations are working together to broaden the scope of the data and maps indicating the status of non-pregnant women of reproductive age as well as pregnant women.


Historical trends graph

Adapted from: Iodine Global Network 2022 - Zimmermann & Andersson Eur J Endocrinol. 2021

The work to keep iodine deficiency at bay has been a public health success story, involving partners that include national governments, international and civil society organizations and the salt industry.  This effective collaboration brought the number of countries with insufficient iodine status down from 113 in 1993 to 21 in 2021.


Download 2023 map


Download 2023 country data


Download 2020 map


Download 2020 country data


Download 2019 map


Download 2019 country data


Download 2017 map


Download 2017 country data


Download country data 2015


Visit the WHO Vitamin and Mineral Nutrition Information System

To see more data on iodine status or on other micronutrients, visit the link below