Evidence check: Cortisol senken in the context of Müdigkeit

A MyBody-X cortisol test can provide a snapshot of your cortisol level, but it is not a diagnostic tool for chronic fatigue. Fatigue has many potential causes: sleep disorders, thyroid dysfunction, iron deficiency, depression, or post-viral syndromes. Cortisol levels fluctuate throughout the day and are affected by acute stress, meals, and circadian rhythm. A single home test result is unreliable for assessing stress-related exhaustion. Evidence for self-testing cortisol in fatigue is mixed and mostly based on practice rather than strong clinical trials. For a meaningful assessment, a doctor may order a diurnal salivary cortisol profile or a dexamethasone suppression test. Caveat: Do not self-treat with cortisol or adaptogens. Use the test as a conversation starter with your healthcare provider, not as a standalone answer.