Thyroid problems result from malfunctioning thyroid glands, butterfly-shaped glands located in the front of the neck. Located along the front of the windpipe, just below the larnyx. There are mainly three hormones secreted by the gland, namely Triidothyronin T3, Tetraidothyroxine T4 and Calcitonin. Even though T3 is the main functional hormone, 90% of thyroidal secretion is of T4. These hormones affect virtually every organ function, including brain and somatic development in infants and almost all metabolic activity in adults.