Is TSH useful for Stress?

TSH (thyroid-stimulating hormone) is primarily a marker of thyroid function, not a direct indicator of stress. While chronic stress can dysregulate the hypothalamic-pituitary-thyroid axis and alter TSH levels, a single TSH measurement is not a validated stress test. In practice, TSH is included in wellness panels (e.g., Men's Wellness Check) for fatigue, which may overlap with stress symptoms. However, the evidence for using TSH as a stress biomarker is weak: no established reference ranges exist for 'stress TSH.' Normal TSH does not rule out stress-related complaints, and abnormal values require clinical evaluation for thyroid disorders. Direct-to-consumer tests marketing TSH for stress are misleading. For stress assessment, cortisol profiles or validated questionnaires are more appropriate. Safety note: Do not self-medicate with thyroid hormones based on TSH results without a physician's diagnosis.