What mineral is critical for thyroid function?

Iodine is critical for thyroid function because it is a vital component of thyroid hormones, specifically thyroxine (T4) and triiodothyronine (T3). These hormones play key roles in regulating metabolism, growth, and development in the body. Without adequate iodine intake, the thyroid may not produce sufficient hormones, leading to conditions such as goiter and hypothyroidism.

Iodine deficiency can lead to various health issues, including cognitive impairments and developmental delays in children, demonstrating its importance in maintaining optimal thyroid function. While calcium, sodium, and iron are essential minerals for various bodily functions, they do not have the specific role that iodine has in thyroid hormone synthesis and regulation. Thus, iodine stands out as the critical mineral for proper thyroid function.