What should I know about cortisol messen zu hause?

Home cortisol testing (e.g., via saliva or blood) is increasingly offered as a direct-to-consumer product. Key points: Cortisol follows a strong circadian rhythm (highest in the morning, lowest at night) and is influenced by acute stress, sleep deprivation, caffeine, and many medications. A single measurement is therefore rarely meaningful. Most home tests, including those from MyBody-X (e.g., Hormon VitalCheck), lack clinical validation for diagnosing adrenal insufficiency or Cushing's syndrome. Without physician oversight and repeated sampling, results can easily be misinterpreted. The evidence for clinical utility is weak – these tests are best considered lifestyle products. If you suspect a cortisol disorder, consult an endocrinologist for standardized tests (e.g., dexamethasone suppression test, 24h urine cortisol). Caveat: No home test replaces medical diagnosis.