What to watch with CYP1A2 and Wechseljahre?

CYP1A2 is an enzyme that metabolizes caffeine and also estrogens. During menopause, estrogen levels drop, which can indirectly affect CYP1A2 activity. Women with a slow CYP1A2 variant (e.g., rs762551 AA) may be more sensitive to caffeine, potentially worsening sleep issues or hot flashes. Additionally, CYP1A2 plays a role in metabolizing hormone replacement therapy (HRT) and certain medications. However, the evidence is moderate: there are hints from population studies but no strong clinical evidence for direct recommendations. Caveat: a genetic test alone does not replace medical advice, especially regarding HRT or menopausal symptoms. A personalized discussion with a doctor is advisable.