Study of 352 Women Links Hormone Therapy to Healthier Aging Brains

3 articles · Updated · The Washington Post · Nov 5

Among 352 cognitively healthy 70-year-old women, those with longer reproductive spans showed less small-vessel damage and better-preserved white matter, with oral-contraceptive and hormone-therapy users showing the healthiest brain profiles.
The Neurology study is observational, so it does not prove estrogen caused those differences, but it strengthens the idea that a lifetime tally of "estrogen years" may shape brain aging beyond menopause.
Recent evidence has shifted attention to timing: older trials that raised dementia alarms enrolled women 65 and up, while newer observational studies suggest hormone therapy started around menopause may be linked to lower dementia risk.
Medical guidance is already softening for menopausal symptoms—U.S. prescriptions had fallen nearly 40% after a 2002 study—yet doctors still do not recommend hormone therapy to prevent Alzheimer’s because the neurological evidence remains incomplete.