Can CLOCK help with Müdigkeit?

Whether the CLOCK gene can help with fatigue requires a nuanced view. CLOCK (Circadian Locomotor Output Cycles Kaput) is a core circadian rhythm gene. Variants like rs1801260 have been associated with sleep duration, chronotype, and daytime sleepiness in GWAS. However, effect sizes are small, and the evidence is primarily associative, not causal. Fatigue is multifactorial; sleep hygiene, light exposure, stress, and underlying medical conditions are far more influential. A DNA test for CLOCK may offer a hint about your circadian predisposition, but it cannot diagnose or treat fatigue. Evidence: moderate (GWAS-based). Caveat: No clinical intervention studies support using CLOCK genotyping alone to manage fatigue.