wann ist ein test auf östrogen, progesteron und cortisol sinnvoll? — can a microbiome test help?

Testing for estrogen, progesterone, and cortisol is clinically useful when there is a suspected hormonal disorder – e.g., irregular cycles, infertility, early menopause, or symptoms of cortisol excess (Cushing) or deficiency (adrenal insufficiency). Measurements are typically done in blood, saliva, or urine and must be interpreted by a physician because values vary with circadian rhythm (cortisol) or menstrual phase (estrogen, progesterone). A microbiome test cannot directly assess these hormones. While the gut microbiota influences hormone metabolism via the 'estrobolome', the evidence for actionable insights from stool tests is still weak. Such tests are not a substitute for endocrinological evaluation. The provided context contains no validated data on hormone testing or microbiome. Therefore, evidence is rated as 'mixed': there is scientific basis, but consumer tests often overclaim. Caution is advised against self-diagnosis and unnecessary supplementation.