Nestled at the base of your neck, the thyroid gland—shaped like a butterfly—controls many of your body’s chemical processes. Energy levels, body temperature, and metabolic rate—these all depend on the thyroid hormones thyroxine (T4) and triiodothyronine (T3). Your thyroid gland works hard to produce them. Hormones are body-wide messengers. They affect nearly every cell, altering.. [Read More]