Can Östradiol help with longevity?

Whether estradiol can promote longevity is not clearly established by current evidence. Estradiol, a primary estrogen, has protective effects on cardiovascular health and bone density in premenopausal women. Animal studies suggest it may influence telomere maintenance and mitochondrial function, but human data are mixed. The Women's Health Initiative (WHI) trial found that hormone replacement therapy (HRT) with conjugated equine estrogens plus progestin increased risks of breast cancer, stroke, and thromboembolism in older women, while estrogen-only therapy in younger women showed some cardioprotective benefits. Overall, the evidence is mechanistic and observational, not sufficient to recommend estradiol for longevity. Individual genetic variants (e.g., in ESR1 or CYP19A1) may modulate effects, but consumer DNA tests do not provide validated clinical guidance on this. Any use of estradiol should be discussed with a physician, weighing benefits and risks.