Jodmangel
Iodine deficiency has largely been confined to the developing world for several generations, but reductions in salt consumption and changes in dairy processing practices eliminating the use of iodine-based disinfectants have led to increasing prevalence of the condition in Australia and New Zealand in recent years. A proposal to mandate the use of iodized salt in most commercial breadmaking was adopted in Australia in October 2009. In a study of the United Kingdom published in 2011, almost 70% of test subjects were found to be iodine deficient. The study's authors suggested an investigation regarding "evidence-based recommendations for iodine supplementation".