Iodine Global Network (IGN)

Global Iodine Nutrition Scorecard and Map

If you have questions or would like to share new data from national IDD/USI surveys for inclusion in the next Scorecard and map update, please contact us.

Global Scorecard of Iodine Nutrition

Last updated: 9 June 2021

Global Map of Iodine Nutrition

Last updated: 9 June 2021

Global map of legislation on salt iodization

The Global Fortification Data Exchange (GFDx), is a tool created by a consortium of partners in food fortification: Food Fortification Initiative (FFI), Global Alliance for Improved Nutrition (GAIN), Iodine Global Network (IGN), and Micronutrient Forum. Visit the GFDx website to access and download the latest interactive maps and visualizations of data on fortification of salt, maize, oil, rice and wheat flour.

Household coverage of iodized salt

Source: UNICEF State of the World's Children, 2017

Selected resources

Gizak M, Rogers L, Gorstein J, Zimmermann M, Andersson M
Presented as a poster at Nutrition 2018, the American Society for Nutrition annual conference, on 9-12 June, 2018, Boston, MA, USA.
Karen Codling, Christiane Rudert, France Bégin, and Juan Pablo Peña-Rosas
2017, Public Health Nutrition
These maps show global progress made at the national level since the first global scorecard was published in 1993 to the most recent update in January 2015. The darker the colour, the more severe the iodine deficiency as a public health problem.
IDD Newsletter 1/2015
Before 1990, only a handful of countries were iodine sufficient. As a result of remarkable efforts in the past two and a half decades, the latest global estimate of iodine nutrition looks more optimistic than ever. Here is a summary of the most important changes since 2012.
Elizabeth N. Pearce, Maria Andersson, and Michael B. Zimmermann
2013, THYROID, Volume 23, Number 5
Maria Andersson, Vallikkannu Karumbunathan, and Michael B. Zimmermann
2012, The Journal of Nutrition
Michael B. Zimmermann and Maria Andersson
2012, Curr Opin Endocrinol Diabetes Obes 19:382–387
Bruno de Benoist, Erin McLean, Maria Andersson, and Lisa Rogers
2008, Food and Nutrition Bulletin vol. 29, no. 3
Bruno de Benoist, Maria Andersson, Ines Egli, Bahi Takkouche, Henrietta Allen
2004, Department of Nutrition for Health and Development, WHO
World Health Organization: Geneva
ISBN 92 4 159200 1