# Global iodine deficiency awareness > Live situation record from CLSTR: https://clstr.news/situations/global-iodine-deficiency-awareness > Updated: 2026-10-20T12:08:00.000Z. Sources: 4. Developments: 2. In observance of World Iodine Deficiency Day and Global Iodine Deficiency Disorders Prevention Day on October 21, health experts are highlighting the critical role of iodine in human health. Iodine is essential for the thyroid gland to produce hormones that regulate metabolism, body temperature, and the functioning of the brain and nervous system. Deficiencies can lead to serious conditions such as hypothyroidism and goiter. The risks are particularly acute for vulnerable populations, including pregnant women, breastfeeding mothers, and children. In these groups, inadequate iodine can cause irreversible damage to brain and nervous system development, potentially leading to cognitive impairments, reduced learning abilities, and physical growth issues. To prevent deficiency, experts recommend the use of iodized salt and a balanced diet containing seafood, dairy, eggs, and vegetables. However, medical professionals caution against excessive salt consumption and the unmonitored use of iodine supplements, which may also negatively impact thyroid health. ## Timeline ### 2026-10-20: Iodine deficiency impacts thyroid health and development Iodine deficiency can cause serious health issues, including goiter and impaired cognitive development in children. Experts emphasize the importance of balanced nutrition and caution against unregulated iodine' 2 sources. https://clstr.news/cluster/iodine-deficiency-impacts-thyroid-health-and-development ### 2026-10-20: World Iodine Deficiency Day highlights importance of iodized salt World Iodine Deficiency Day emphasizes the necessity of iodized salt for thyroid function, metabolism, and the healthy brain and physical development of children and fetuses. 2 sources. https://clstr.news/cluster/world-iodine-deficiency-day-highlights-importance-of-iodized-salt --- Cite as: Global iodine deficiency awareness. CLSTR, https://clstr.news/situations/global-iodine-deficiency-awareness