TSH (thyroid-stimulating hormone) is a key regulator of thyroid function, not a direct sleep aid. Abnormal TSH levels can indicate thyroid dysfunction—hyperthyroidism (low TSH, often linked to insomnia) or hypothyroidism (high TSH, often linked to fatigue and increased sleep need). In that sense, measuring TSH can indirectly help identify underlying causes of sleep issues if a thyroid disorder is present. However, TSH alone is not a specific marker for sleep quality or duration. Evidence is based on clinical practice: thyroid hormones influence metabolism and thus the sleep-wake cycle. A TSH test may be useful when symptoms like persistent fatigue, insomnia, or unexplained exhaustion occur. Without medical evaluation and additional parameters (fT3, fT4), its interpretative value is limited. MyBody-X offers hormone tests that include TSH, but interpretation should always be done by a physician. Self-treating with TSH or thyroid hormones is dangerous and not indicated.
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