What to watch with TSH Schilddrüse and weight loss?

TSH (thyroid-stimulating hormone) is a key lab marker for thyroid function. In the context of weight loss, hyperthyroidism (low TSH, elevated fT3/fT4) can increase basal metabolic rate and cause unintentional weight loss. However, TSH alone is insufficient; free T3, free T4, antibodies (TPO, TRAK), and often ultrasound are required for diagnosis. Consumer DNA tests for thyroid-related genes (e.g., VDR, DIO2) provide only weak, non-actionable signals—evidence is mechanistic or practice-based, not clinically predictive. The MyBody-X products mentioned (Cardio Risk Check, MY FOODBOOK) address cardiovascular risk and personalized nutrition, not thyroid diagnostics. For unexplained weight loss accompanied by symptoms like palpitations, tremor, or heat intolerance, a clinical TSH test is essential. Even subclinical thyroid changes can affect metabolism over time. Bottom line: TSH is a useful screening tool, but interpreting it requires a physician. No at-home test can replace professional evaluation for thyroid-related weight changes.