Cortisol senken: can a DNA test help?

A DNA test can provide insights into genetic variants linked to cortisol regulation (e.g., in genes like NR3C1, FKBP5, or CRHR1). These variants are mostly derived from GWAS and have small effect sizes. They may indicate a genetic predisposition to higher cortisol or altered stress response, but they are not diagnostic. Lifestyle factors—sleep, stress management, exercise, and diet—have a far greater impact on cortisol levels than genetics. Commercial tests often overstate their predictive power. A DNA test alone cannot tell you if your cortisol is elevated or how to lower it. Reliable assessment requires clinical measurements (saliva, blood, or urine cortisol) and medical evaluation. The evidence is primarily at the GWAS level, not from interventional trials. Therefore, a DNA test can serve as supplementary information but should not replace medical diagnostics or lifestyle changes.