Hypothyroidism is a condition in which thyroid gland is under active and does not produce required amount of thyroid hormones. The thyroid gland is a butterfly shaped gland which lies in front of the neck. The hormones produced by the thyroid gland are T3 & T4 which have impact on the metabolism as they control vital functions of the body such as temperature and heart rate. The hormones produced by thyroid gland are responsible for providing energy to almost every organ in the body and controls functions like heart beat, digestion etc. Thus when thyroid gland stops working on optimum level then functions of the body begin to slow down.