Taking more thyroid hormone might help him lose weight but much of the weight loss will be

Indeed, measurement of the BMR was one of the earliest tests used to assess a patient's thyroid status. Patients whose thyroid glands were not working were found to have low BMRs, and those with overactive thyroid glands had high BMRs. Later studies linked these observations with measurements of thy

BMRs are not the whole story relating weight and thyroid. For example, when metabolic rates are reduced in animals by various means, these animals often do not show the expected excess weight gain. Thus, the relationship between metabolic rates, energy balance, and weight changes is very complex. There are many other hormones, proteins, and other chemicals that are very important for controlling energy expenditure, food intake, and body weight.