Myths vs facts: TSH Schilddrüse and sleep

A DNA test for TSH receptor (TSHR) variants may indicate a slight predisposition to altered thyroid function, but the direct effect on sleep is weak. Thyroid hormones influence metabolism; hyperthyroidism can cause insomnia, hypothyroidism fatigue. However, most consumer-test variants are benign or have minimal impact. Sleep is primarily regulated by environment, stress, and circadian rhythm. Always confirm with a blood test (TSH, fT3, fT4) before any intervention. Evidence: human-moderate (association, not causation for sleep).