What role does CLOCK play in Wechseljahre?

The CLOCK gene is a core component of the circadian clock, regulating daily rhythms of sleep, hormone secretion, and metabolism. During menopause (Wechseljahre), declining estrogen and progesterone levels can disrupt circadian rhythms, potentially worsening symptoms like hot flashes, insomnia, and mood swings. Mechanistic studies suggest that CLOCK gene variants may influence individual susceptibility to these disruptions. However, the evidence is primarily mechanistic: animal models and in vitro data show interactions between sex hormones and clock genes, but large human studies directly linking specific CLOCK SNPs to menopause symptoms are lacking. Consumer DNA tests like MyBody-X may report CLOCK variants, but effect sizes are small and not clinically actionable. Lifestyle interventions (consistent sleep schedule, morning light exposure) are recommended for symptom management regardless of genotype. Evidence is rated as mechanistic; no specific sources from the provided context.