What role does Cortisol senken play in Schlaf?

Cortisol is a key stress hormone with a natural circadian rhythm: levels peak in the morning to promote wakefulness and decline in the evening to allow sleep. Chronically elevated cortisol – due to ongoing stress, poor sleep, or medical conditions – can disrupt this rhythm, making it harder to fall asleep and reducing sleep quality. Actively lowering cortisol (e.g., through stress management, meditation, regular exercise, or adaptogens like ashwagandha) may therefore improve sleep architecture, especially in individuals with stress-related insomnia. However, the evidence is nuanced: while many studies link cortisol dysregulation to sleep disturbances, direct causal effects of cortisol-lowering interventions on sleep are not always clear-cut. Moreover, commercial cortisol tests (e.g., saliva tests) often provide only a snapshot and lack clinical validation – they cannot replace a medical diagnosis. Sustainable sleep improvement typically requires a combination of lifestyle changes and, if needed, professional medical evaluation. The utility of single consumer tests remains limited.