Lay opinion vs evidence: Schlaf Alltag

Common lay opinions about sleep include: 'You can catch up on lost sleep over the weekend' or 'Melatonin is a harmless sleep aid.' Evidence tells a different story. Sleep debt cannot be fully repaid – chronic restriction impairs cognition, immune function, and metabolism (see sleep restriction studies). Melatonin is a hormone; short-term use may help, but long-term effects are poorly studied and it can disrupt natural circadian rhythms. The '8-hour rule' is an average – optimal sleep duration varies genetically and with age. Many people underestimate the importance of sleep hygiene: consistent bedtimes, reducing blue light in the evening, and avoiding afternoon caffeine are evidence-based. Direct-to-consumer genetic tests for sleep genes (e.g., CLOCK, PER) provide only suggestive information, not diagnoses. In summary, lay views tend to be overly optimistic or simplistic, while the science emphasizes complexity and individual variability.