Certified Nutrition Specialist (CNS) Practice Exam 2025 - Free CNS Practice Questions and Study Guide

In the context of autoimmune Hashimoto's thyroiditis, iodine is known to have a complex relationship with thyroid function and immune activity. While iodine is essential for the production of thyroid hormones, excessive supplementation can exacerbate the condition. In individuals with Hashimoto's, which is characterized by autoimmune-mediated inflammation of the thyroid gland, high levels of iodine may trigger or worsen the autoimmune response and lead to increased thyroid dysfunction. This is particularly crucial for those who already have sufficient or elevated iodine levels in their diet. Managing iodine intake is therefore important for individuals with Hashimoto's, highlighting the need for careful monitoring and consultation with healthcare professionals regarding supplementation.

In contrast, other nutrients such as selenium and zinc are often considered beneficial for individuals with Hashimoto's, as they can support thyroid function and may help mitigate inflammation. Iron has a role in many bodily functions but does not specifically worsen Hashimoto's, making iodine the key nutrient of concern when supplemented in excess.