Monitoring the effect of introducing mandatory iodisation at an elevated iodine concentration on the iodine content of retailer salt after 1, 3 and 5 years in South Africa

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dc.contributor.authorJooste, P.L.
dc.contributor.departmentNutritional Intervention Research Unit, Medical Research Council, PO Box 19070, Tygerberg 7505, Cape Town, South Africaen_US
dc.date.accessioned2020-01-06T07:06:22Z
dc.date.available2020-01-06T07:06:22Z
dc.date.epub2009-07-06
dc.date.issued2004-11
dc.description.abstractIn this study we monitored the short-term, medium-term and long-term effects of introducing mandatory iodisation at an elevated iodine concentration on the iodine content of retailer salt. In 1995 retailer salt samples were purchased in 48 sentinel towns, situated in three of the nine provinces of South Africa, shortly before the introduction of mandatory iodisation at an elevated iodine concentration of 40 /60 ppm, and again 1, 3 and 5 years later. The iodine concentrations in these salt samples were determined by means of the iodometric titration method. Within 1 year the mean iodine concentration more than doubled from 14 to 33 ppm, and further increased to 42 ppm over the next 2 years. However, after another 2 years, the mean iodine concentration relapsed to a lower concentration of 33 ppm. The distribution of iodine values followed the same trend and exhibited a sharp increase in the percentage of under-iodised salt samples at 5 years of follow-up. This study showed the favourable short-term and medium-term impact of introducing mandatory iodisation at an elevated iodine concentration on the iodine content of retailer salt, as well as the reality of a relapse in the long term, emphasising the need for regularly monitoring the iodine content of retailer salt.en_US
dc.description.sponsorshipBenade´ JG, Oelofse A, Van Stuijvenberg ME, Jooste PL, Weight MJ & Benade´ AJS (1997): Endemic goitre in a rural area of KwaZulu-Natal. S. Afr. Med. J. 87, 310 / 313. Dunn JT (2000): Complacency: the most dangerous enemy in the war against iodine deficiency. Thyroid 10, 681 /683. Hetzel BS & Pandav CS (1996): S.O.S. for a Billion. The Conquest of Iodine Deficiency Disorders, pp. 31 /55. Delhi: Oxford University Press. Jooste PL (2003): Assessment of the iodine concentration in table salt at the production stage in South Africa. WHO Bull. 81, 517 /521. Jooste PL, Weight MJ & Kriek JA (1997): Iodine deficiency and endemic goitre in the Langkloof area of South Africa. S. Afr. Med. J. 87, 1374 /1379. Jooste PL, Weight MJ, Locatelli-Rossi L & Lombard CJ (1999): Impact after 1 year of compulsory iodisation on the iodine content of table salt at retailer level in South Africa. Int. J. Food Sci. Nutr. 50,7 /12. Jooste PL, Weight MJ & Lombard CJ (2001): Iodine concentration in household salt in South Africa. WHO Bull. 79, 534 /540. Kalk J, Paiker J, Van Arb MG & Pick W (1998): Dietary iodine deficiency in South Africa. S. Afr. Med. J. 88, 357 / 358. Mannar MGV & Dunn JT (1995): Salt Iodization for the Elimination of Iodine Deficiency, pp. 107 /112. The Netherlands: International Council for the Control of Iodine Deficiency Disorders. Muture BN & Wainaina JN (1994): Salt iodation in Kenya for national prophylaxis of iodine deficiency disorders. East. Afr. Med. J. 71, 611 /613. Taha AM, Zainab T, Lau D & Yeo P (1995): Survey of availability of iodine-enriched salt in Sarawak. Med. J. Malaysia 50, 391 /395. Todd CH, Allain T, Gomo ZAR, Hasler JA, Ndiweni M & Oken E (1995): Increase in thyrotoxicosis associated with iodine supplements in Zimbabwe. Lancet 346, 1563 / 1564. Van der Haar F (1997): The challenge of global elimination of iodine deficiency disorders. Eur. J. Clin. Nutr. 51, S3 / S8. WHO/UNICEF/ICCIDD (1996): Recommended Iodine Levels in Salt and Guidelines for Monitoring their Adequacy and Effectiveness. Geneva: World Health Organisation, WHO/NUT/96.13. WHO/UNICEF/ICCIDD (2001): Assessment of Iodine Deficiency Disorders and Monitoring their Elimination. Geneva: World Health Organization, WHO/NDH/01.1.en_US
dc.identifier.citationJooste P. Monitoring the effect of introducing mandatory iodisation at an elevated iodine concentration on the iodine content of retailer salt after 1, 3 and 5 years in South Africa. INTERNATIONAL JOURNAL OF FOOD SCIENCES AND NUTRITION [Internet].en_US
dc.identifier.issn09637486.
dc.identifier.journalFood science and nutrition.en_US
dc.identifier.urihttps://infospace.mrc.ac.za/handle/11288/595220
dc.language.isoenen_US
dc.publisherTaylor & Francis.en_US
dc.relation.urlhttps://doi.org/10.1080/09637480400010399en_US
dc.research.unitClosed Unitsen_US
dc.rightsAttribution 3.0 United States*
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/us/*
dc.titleMonitoring the effect of introducing mandatory iodisation at an elevated iodine concentration on the iodine content of retailer salt after 1, 3 and 5 years in South Africaen_US
dc.typeArticleen_US
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