Is Cortisol senken useful for Schlaf?

Whether lowering cortisol improves sleep requires a nuanced, evidence-based answer. Cortisol, the primary stress hormone, follows a circadian rhythm: high in the morning, low at night. Chronically elevated cortisol – due to chronic stress, poor sleep, or conditions like Cushing's syndrome – can indeed impair sleep by prolonging sleep onset and reducing deep sleep. However, deliberately lowering cortisol in healthy individuals without confirmed hypercortisolism is not a proven sleep intervention. Supplements like ashwagandha, phosphatidylserine, or magnesium are often marketed for this purpose, but the evidence is moderate: some small studies show modest improvements in sleep quality, but effects are inconsistent and not robustly replicated. Addressing root causes – stress management, sleep hygiene, regular exercise, and a balanced diet – is more effective and safer. Cortisol plays essential roles in metabolism and immune function; indiscriminate lowering can be harmful. If a cortisol disorder is suspected, an endocrinologist should be consulted. In summary, cortisol lowering may be useful when levels are genuinely elevated, but it is not a universal sleep aid. Evidence level: human-moderate.