What role does TSH Schilddrüse play in weight loss?

TSH (thyroid-stimulating hormone) is a key regulator of thyroid function. Elevated TSH indicates hypothyroidism, which slows basal metabolic rate and often leads to weight gain. Conversely, hyperthyroidism (low TSH) accelerates metabolism and can cause weight loss. However, TSH's role in weight loss is indirect: TSH itself is not a direct 'weight loss hormone.' In euthyroid individuals (normal TSH), there is no robust evidence that TSH levels within the normal range significantly affect weight loss outcomes. Moreover, weight changes themselves can alter TSH levels—for example, caloric restriction lowers TSH. The evidence is based on clinical observation and endocrine physiology, not on randomized weight-loss trials. Therefore, while TSH screening is reasonable for unexplained weight changes, optimizing TSH without thyroid disease is not a validated weight-loss strategy.