The thyroid gland is a small butterfly-shaped gland located in the neck, just below the Adam's apple. It is part of the endocrine system and produces hormones that regulate metabolism and energy levels in the body.

The thyroid gland produces two main hormones, triiodothyronine (T3) and thyroxine (T4), which are essential for the proper functioning of the body. These hormones affect various processes in the body, including heart rate, body temperature, and energy levels.