The re-emergence of mild iodine deficiency in Tasmania in the late 1990s 1 led the state
government to introduce a voluntary bread fortification program in 2001, under which the
baking industry replaced regular salt in bread with iodised salt. This interim measure
preceded the binational response to the widespread re-emergence of iodine deficiency in
Australia and New Zealand, where iodisation of bread has been mandatory since 2009.The
impact of voluntary and mandatory fortification has been assessed in urinary iodine surveys …