Risks and limits of Schlaf Test

The Sleep Test offered by MyBody-X (if available) shares the same limitations as many direct-to-consumer tests: it typically measures a single biomarker (e.g., cortisol from a finger-stick) or analyzes genetic variants associated with sleep patterns. A single cortisol reading cannot diagnose chronic insomnia, burnout, or sleep apnea—multiple measurements over the day (diurnal profile) and a clinical evaluation are required. Genetic markers like PER3 or CLOCK have small effect sizes and are insufficient to derive a personalized sleep strategy. The evidence for such tests is weak („unclear“). Risks include false reassurance or unnecessary worry. Anyone with serious sleep issues should consult a physician or sleep lab rather than rely solely on a home test.