The thyroid gland is a butterfly-shaped organ situated at the front base of your neck. The thyroid gland makes and releases two thyroid hormones: thyroxine or T4 and triiodothyronine or T3. These two hormones affect every cell and all the organs of your body. It provides energy. When the thyroid does not make enough hormones, people can become tired, feel cold and suffer from hair loss. Skin can also become dry. When the thyroid gland produces too much hormone, patients complain of nervousness, feeling very warm and heart palpitations. Their eyes can have a bulging effect giving a "staring" or "frightened" appearance. When the thyroid develops cancer, it can spread to lymph nodes in the neck. Investigators found sufferers who were taking metformin had more lymph node spread than those not taking the medication.
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