welche werte bei schilddrüsenunterfunktion — what does this mean exactly?

The question about which lab values are relevant for hypothyroidism (underactive thyroid) is well-established in clinical medicine. The key parameters are TSH (thyroid-stimulating hormone), free T3 (fT3), and free T4 (fT4). In primary hypothyroidism, TSH is elevated while fT3 and fT4 are low. In secondary (pituitary) hypothyroidism, all values may be low. Additionally, thyroid antibodies (TPO-Ab, Tg-Ab) are often measured to diagnose autoimmune Hashimoto's thyroiditis. Reference ranges vary by lab, so medical interpretation is essential. A direct-to-consumer DNA test cannot replace these blood tests; it might only indicate genetic predispositions, which are not diagnostic. The evidence for these lab values is strong (human-strong). Caveat: self-medication or interpretation without a physician is risky. Values should always be assessed together with symptoms and further clinical findings.