Evidence check: CLOCK in the context of Wechseljahre

The CLOCK gene is a core component of the circadian rhythm machinery. In the context of menopause (Wechseljahre), hormonal changes, particularly declining estrogen, can disrupt circadian rhythms, leading to sleep disturbances, hot flashes, and metabolic changes. Some studies have investigated CLOCK polymorphisms (e.g., rs1801260) in relation to sleep quality, chronotype, and metabolic syndrome, but direct evidence linking CLOCK variants to menopause-specific symptoms is limited. Most evidence comes from GWAS on chronotype and sleep disorders, not menopause per se. Consumer DNA tests may report CLOCK variants, but the clinical utility for menopause management is unclear. Lifestyle interventions (light exposure, sleep hygiene) are more impactful. Evidence grade: gwas (human-moderate for circadian traits, but weak for menopause). Caveat: no validated genetic test for menopause symptoms.