Evidence check: Cortisol in the context of menopause

Cortisol is a key stress hormone that can be affected by hormonal changes during menopause. Declining estrogen levels may alter the hypothalamic-pituitary-adrenal (HPA) axis, potentially leading to elevated cortisol levels. Some studies link perimenopausal cortisol increases to sleep disturbances, mood changes, and weight gain. However, the evidence is nuanced: cortisol exhibits strong diurnal variation and is influenced by acute stress, diet, and sleep. A single measurement from a home test is therefore of limited value. No validated genetic markers directly connect menopause to cortisol for personalized recommendations. Most commercial tests claiming to assess cortisol in menopause rely on general physiological associations rather than specific clinical validation. Reliable assessment requires multiple measurements (e.g., salivary cortisol day curve) and medical interpretation. Without this, the evidence for consumer tests remains 'unclear' or 'marketing'. Caveat: Cortisol testing can be useful in clinical settings for conditions like Cushing's syndrome, but not as a standalone menopause management tool.