The thyroid gland is one of the largest glands of the endocrine system which is present in the lower part of the neck. It secretes two important hormones -- triiodothyronine and thyroxine also called T3 and T4 respectively. These hormones are responsible for a lot of things the way in which you metabolize food use energy your sleep patterns your temperature preferences whether you gain or lose weight etc. Thyroid diseases are overlooked in the early stages because of their uncertain and ambiguous symptoms. Here are some quick facts about thyroid disease #1: Hyperthyroidism refers to an increase in production