Which micronutrient is important for thyroid function?

Iodine is an essential micronutrient crucial for thyroid function because it is a key component of thyroid hormones, specifically thyroxine (T4) and triiodothyronine (T3). These hormones are vital for regulating various metabolic processes in the body, including growth, development, and metabolic rate. The thyroid gland absorbs iodine from the bloodstream to synthesize these hormones, making adequate iodine intake necessary for maintaining normal thyroid function. A deficiency in iodine can lead to hypothyroidism and other thyroid-related disorders, highlighting its importance in overall health.

While selenium and iron also play roles in thyroid health—such as aiding in the conversion of T4 to T3 and supporting overall metabolic functions—iodine is specifically required for the production of thyroid hormones. Calcium, although essential for bone health and various cellular functions, does not have a direct role in the synthesis or regulation of thyroid hormones. Thus, iodine stands out as the most critical micronutrient for proper thyroid function.