Excessive levels of which hormone are linked to feelings of coldness?

The link between excessive hormone levels and feelings of coldness primarily involves thyroid hormone. The thyroid gland produces hormones that are crucial for regulating metabolism and maintaining body temperature. When thyroid hormone levels are too low, it can lead to a condition known as hypothyroidism, which often results in sensations of coldness among other symptoms. Conversely, when thyroid hormone levels are balanced or elevated, metabolic processes function optimally, and body temperature levels tend to stabilize.

While cortisol, produced by the adrenal glands, has various roles in the body including the regulation of metabolism and immune response, excessive cortisol is generally associated with stress responses rather than a direct link to feelings of coldness. Insulin primarily regulates blood sugar levels, and estrogen plays a role in various biological functions but is not directly tied to feelings of coldness in the same manner as thyroid hormone. Thus, the correct answer reflects the critical function of thyroid hormones in maintaining temperature regulation within the body.