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World Iodine Deficiency Day is observed on October 21st every year. It is a day dedicated to raising awareness about iodine deficiency and its impact on public health. Iodine is an essential mineral that plays a crucial role in the functioning of the thyroid gland, which, in turn, affects various bodily functions, including metabolism and overall health.

Iodine deficiency can lead to a range of health problems, including goiter (enlarged thyroid gland), intellectual disabilities in children born to iodine-deficient mothers, and various thyroid disorders. To combat iodine deficiency, salt iodization programs have been implemented in many countries. These programs involve adding iodine to table salt, ensuring that people receive an adequate daily intake of iodine through their diets.

World Iodine Deficiency Day aims to promote awareness of the importance of iodine, encourage the use of iodized salt, and highlight the need for iodine supplementation in areas where iodine deficiency is prevalent. It is an opportunity for governments, health organizations, and communities to come together to address this important public health issue and work toward its prevention and elimination.