Tamil Nadu Salt: More Production, Less Iodine!

Tamil Nadu, a major salt-producing state in India, faces a critical challenge with iodine deficiency among its population. In the 2018-19 India iodine survey, only 62% of households in the state were found to be using adequately iodised salt, a figure considerably lower than the national average of 76%. Health Minister K G Arunraj noted that this situation is unacceptable given the state's significant salt production.

Several factors contribute to this deficit. Many families opt for loose, unbranded rock salt, which is susceptible to iodine loss through improper storage and prolonged cooking. Director of Public Health Dr. A. Somasundaram emphasized iodine's vital role in thyroid hormone production, crucial for growth, metabolism, and brain development, especially during pregnancy. Severe deficiency can lead to goitre, miscarriages, stillbirths, and irreversible intellectual impairment in children.

Studies indicate that children from iodine-deficient communities may exhibit lower IQ scores. Goitre, a visible sign of iodine deficiency, was reported in 9% of schoolchildren screened in Ramanathapuram and Villupuram districts between 2018-19 and 2024-25. The state food safety department enforces regulations requiring salt for consumption to contain specific iodine levels. While some districts show adequate iodisation percentages between 70% and 88% in recent sample analyses (April 2025 - March 2026), instances of nil iodine content have been detected, prompting intensified action against non-compliant manufacturers.