welche werte bei schilddrüsenunterfunktion — when to see a doctor?

In hypothyroidism, the key lab values are TSH, fT3, and fT4. An elevated TSH (>4.0 mU/l, lab-dependent) with low fT4 indicates primary hypothyroidism. Thyroid antibodies (TPO-Ab, Tg-Ab) can help diagnose autoimmune Hashimoto's thyroiditis. MyBody-X offers biomarker tests that can measure these values, but they are not a substitute for medical diagnosis. You should see a doctor if you experience symptoms such as fatigue, weight gain, cold intolerance, brain fog, or depression, or if your lab results fall outside the reference range. Even if you have a known thyroid condition, any change in symptoms warrants a medical consultation. Only a physician can interpret the results in context, rule out other causes, and initiate appropriate treatment (e.g., levothyroxine). The evidence is based on standard clinical practice and guidelines; self-testing without medical oversight can lead to misinterpretation or delayed treatment.