What should I know about cortisol messen zu hause 2?

Home cortisol testing (saliva, blood, or urine) can help track the daily rhythm of this stress hormone, but accuracy depends heavily on proper collection technique – capillary blood differs from venous draws, and saliva levels fluctuate with circadian rhythm. Most home tests use ISO-certified labs, but clinical validity is limited: single readings are insufficient to diagnose conditions like Cushing's syndrome or adrenal insufficiency. Genetic variants such as rs3091244 in the CRP gene (inflammation marker) are sometimes mistakenly linked to cortisol, but they are not directly relevant. Home testing is best used for trend monitoring under medical guidance. If results are persistently high or low, consult a healthcare provider. Marketing claims that a DNA test alone can optimize cortisol levels are not evidence-based.