The Interregional center of public health and development assisted by Sechenov Moscow Medical Academy undertook, 1999-2000, a study of the standard of knowledge, attitude and conduct of consumers in respect to the use of iodinated salt (IS) in the prevention of iodine-deficient diseases (IDD). It was demonstrated that, on the average per one district, 19% of city respondents and 13% of rural respondents used IS only. About 31% of city respondents used IS when it was available at the next-door shop, i.e. from time to time. This figure reached 48% in Irkutsk and Orenburg Regions. The share of those who used IS sometimes in rural regions made an average of 20.7%. 67.2% of those who believe that IDD can be prevented think that ID can also be prevented. Less than 5% of them say ID cannot be regarded as a reliable tool in the prevention of IDD.