wann ist ein test auf östrogen, progesteron und cortisol sinnvoll? — which blood markers matter?

Testing for estrogen, progesterone, and cortisol can be useful in specific clinical contexts, but it is not a general wellness screening. These are blood (or saliva/urine) markers, not DNA-based. Here’s when testing is evidence-based: - **Estrogen & Progesterone**: Indicated for menstrual irregularities, infertility, suspected menopause, or hormone replacement therapy monitoring. However, levels fluctuate with the menstrual cycle and age. A single random measurement is often misleading. Proper timing (e.g., early follicular phase for estradiol, mid-luteal for progesterone) is critical. - **Cortisol**: Useful for diagnosing adrenal insufficiency (Addison’s disease) or Cushing’s syndrome. Because cortisol follows a circadian rhythm (peak in the morning) and is stress-sensitive, a single blood draw is unreliable. Salivary cortisol profiles (multiple time points) or 24-hour urinary free cortisol are more accurate. **Limitations of consumer tests**: Many direct-to-consumer hormone tests provide a single snapshot without accounting for cycle phase, time of day, stress, or medications. Without medical interpretation, results can cause unnecessary anxiety or false reassurance. Evidence for “hormone balance” panels in asymptomatic individuals is weak (mechanistic/practice level). **Bottom line**: These markers matter when there is a specific clinical suspicion. For healthy individuals without symptoms, routine testing is not recommended. Always consult a doctor (endocrinologist or gynecologist) for proper indication and interpretation.