What role does CLOCK play in Schlaf?

CLOCK (Circadian Locomotor Output Cycles Kaput) is a core circadian gene that governs the sleep-wake cycle by regulating the transcription of numerous downstream genes involved in metabolism, hormone release, and cell division. Variants in CLOCK have been associated with altered sleep timing, difficulty falling asleep, and a preference for later bedtimes (evening chronotype). The evidence is strong from human genetic studies and GWAS, showing modest but reproducible effects on sleep parameters. However, individual impact is small; lifestyle factors like light exposure and daily routine are far more influential. Consumer DNA tests like MyBody-X may report CLOCK variants, but their predictive power for sleep disorders is limited. No clinical decision should be based solely on such results. Safety note: persistent sleep issues require medical evaluation, not self-treatment based on genetic data.