wie kann ich cortisol messen — when to see a doctor?

Cortisol can be measured via blood, saliva, or urine, depending on the question (daily rhythm, stress response, adrenal function). Simple home tests (e.g., saliva) are available as screening tools but are not sufficient for medical diagnosis. You should see a doctor if you have persistent symptoms such as fatigue, weight changes, sleep disturbances, blood pressure fluctuations, or unrelenting stress. Only a physician can properly interpret results and rule out organic causes (e.g., Cushing's, Addison's). The evidence for home tests is weak; they can provide hints but not a diagnosis. Caution: self-interpretation may lead to unnecessary worry or wrong actions. If you suspect cortisol dysregulation, seek medical evaluation.