Calcium plays a role in the regulation of thyroid function, particularly in the release of thyroid hormones. Adequate levels of calcium are necessary for the proper secretion of thyroid-stimulating hormone (TSH) from the pituitary gland, which, in turn, stimulates the production of thyroid hormones (T3 and T4) by the thyroid gland. Calcium also facilitates the binding of TSH to its receptors in the thyroid gland, enhancing the synthesis and release of thyroid hormones. Thus, calcium is involved in the regulation of thyroid hormone production and overall thyroid function.