Thyroid is one of the largest endocrine gland in the body and is responsible for the rate at which body burns energy and makes proteins. This gland produces various hormones that regulate various bodily functions, such as metabolism, and controls the rate for other bodily functions' work. The thyroid produces two main hormones, Thyroxine and Triiodothyronine. The duo maintains the rate at which your body uses fats and carbohydrates; it helps control your body temperature; it influences heart rate, and helps regulate protein metabolism. When thyroid gland malfunctions, the production of its hormones fluctuates. When under-active, it leads to a condition called hypothyroidism; when it is overactive, the outcome is hyperthyroidism.