An endocrinology expert explains that while iodized salt was crucial in combating iodine deficiency in India, it is insufficient for overall thyroid health. Dr. Narendra BS highlights that adequate intake of other nutrients like zinc and protein is also vital for thyroid hormone synthesis and transport. He further notes that diets high in ultra-processed foods can negatively impact metabolic health and disrupt thyroid function, emphasizing the need for a balanced, varied diet beyond just iodized salt.