WHY DOES THYROID CAUSES WEIGHT GAIN? The thyroid is a butterfly-shaped gland and is positioned in the front of the neck. Thyroxine hormones are produced by it. This thyroid hormone aids in the efficient utilization of energy and the proper functioning of the brain . Thyroxine is a hormone that regulates the rate of your metabolism (the system that helps the body use energy). Thyroid diseases cause thyroxine production to be disrupted, which can slow or speed up metabolism . Thyroid hormone is produced in extremely small amounts when the thyroid is underactive. Hypothyroidism is the medical term for this thyroid condition. Your metabolism slows down as a result of low thyroxine levels, resulting in weight gain. The amount of oxygen consumed by the body over a period of time is used to determine metabolism. The basal metabolic rate (BMR) is the rate of metabolism when the body is at rest. Low BMRs were discovered in patients whose thyroid glands were not functioning properly. The difference between the number of calories one consumes and the number of calories used by the body is referred to as energy balance. Changes in energy balance are linked to differences in BMRs. Because the BMR in hypothyroidism patients is lower, an underactive thyroid is usually associated with weight gain. Weight gain is frequently greater in people with more severe hypothyroidism. The cause of weight increase in hypothyroid people is likewise complicated, and it may or may not be related to the buildup of excess fat. The majority of the weight gain in hypothyroid people is due to an excess of salt and water. Depending on the degree of hypothyroidism, the thyroid may be responsible for 5 to 10 pounds of body weight gain. Let’s take it a step further to thyroid weight loss.