Thyroids – Metabolism, Weight Gain and Your ... Suffering from hyperthyroidism? One of the main reasons why so many people are suffering from hyperthyroidism is due to an autoimmune ailment called Graves’ disease. It stimulates your thyroid gland in such a manner that the gland starts secreting more TS3 and TS4 hormones. For all those people who want to know more about the thyroid gland and how it affects our body, you can consider it to be the regulating organ,...