HRT Cuts Dementia Risk 10% as Early Menopause Signals Later Cognitive Decline
Updated
Updated · Scientific American · Aug 28
HRT Cuts Dementia Risk 10% as Early Menopause Signals Later Cognitive Decline
3 articles · Updated · Scientific American · Aug 28
Summary
More than 180,000 postmenopausal women in the U.K. showed a 10% lower risk of all-cause dementia and a 16% lower risk of Alzheimer’s among hormone therapy users over 13 years.
Women who began HRT at ages 46 to 56 saw lower dementia risk than later starters, while those with surgical menopause posted an even larger 26% risk reduction.
A separate JAMA Network Open study found earlier menopause was linked to later cognitive decline, earlier Alzheimer’s diagnosis, and faster buildup of white-matter damage markers in the brain.
Researchers say the findings strengthen a menopause-related “window of opportunity” theory for brain health, but both studies were observational and cannot prove HRT prevents dementia.
The mixed evidence still includes past research tying combined hormone therapy after age 65 to higher dementia risk, leaving clinical trials and mechanism studies as the next step.