Is TSH useful for Schlaf?

TSH (thyroid-stimulating hormone) is primarily a marker of thyroid function, not a direct indicator of sleep quality or sleep disorders. However, there is a bidirectional relationship: sleep deprivation and circadian disruption can alter TSH levels (e.g., elevated TSH after sleep loss), and thyroid dysfunction (hypo- or hyperthyroidism) can cause sleep disturbances. Therefore, TSH alone is not useful for assessing sleep; it may be part of a broader hormonal panel (including fT3, fT4, cortisol, melatonin) to identify endocrine contributors to sleep issues. MyBody-X offers TSH in its hormone blood test, but without specific validation for sleep. The evidence for TSH as a sleep marker is moderate: human observational studies exist, but no clinical guideline recommends routine TSH testing for sleep complaints. Caveat: A normal TSH does not rule out sleep disorders; persistent sleep problems require a sleep medicine evaluation (e.g., polysomnography). Interpretation must be done in a clinical context.