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
This map was created to represent the current status of legislation on fortification of salt. It will be updated as new information becomes available.
To the best of our knowledge, this data is correct as of 28 June 2016
. Please contact us
if you think there are inaccuracies and would like to share new data.
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.
Global Iodine Nutrition: Where Do We Stand in 2013?
Elizabeth N. Pearce, Maria Andersson, and Michael B. ZimmermannTHYROID
, Volume 23, Number 5, 2013
Global Iodine Status in 2011 and Trends over the Past Decade
Maria Andersson, Vallikkannu Karumbunathan, and Michael B. ZimmermannThe Journal of Nutrition
Update on iodine status worldwide
Michael B. Zimmermann and Maria AnderssonCurr Opin Endocrinol Diabetes Obes
Global Iodine Scorecard 2014: Number of iodine-deficient countries more than halved in the past decade
)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.