A major new study reveals that women are not only more likely to develop Alzheimer's disease, but they also experience stronger cognitive harm from common risk factors. Researchers at UC San Diego School of Medicine analyzed data from more than 17,000 middle-aged and older adults and found that factors like high blood pressure, obesity, and depression impair women's thinking skills more than men's.
The Research
The study, published May 19, 2026, in Biology of Sex Differences, used information from the Health and Retirement Study, a nationally representative sample of U.S. adults. Led by Dr. Megan Fitzhugh and Dr. Judy Pa, the team examined 13 modifiable dementia risk factors, including education, hearing loss, smoking, alcohol use, obesity, depression, physical inactivity, hypertension, and diabetes.
They discovered key sex differences: women reported higher rates of depression (17% vs. 9%), physical inactivity (48% vs. 42%), and sleep problems (45% vs. 40%). Men had higher rates of hearing loss (64% vs. 50%), diabetes (24% vs. 21%), and heavy drinking (22% vs. 12%). But when it came to cognitive impact, several factors hit women harder. High blood pressure, elevated body mass index, hearing loss, and diabetes were all linked to poorer cognitive performance more strongly in women, even when men had higher rates of those conditions.
Why It Matters
This research shifts the focus from which risk factors are most common to which ones pack the biggest punch for each sex. “Looking beyond which risk factors are most common, we found that some have a disproportionately larger impact on women's cognition,” said Fitzhugh. The findings help explain why women account for nearly two-thirds of Alzheimer's cases in the U.S.—longer life alone doesn't explain the gap.
For anyone curious about their brain health, this means personalized prevention may be more effective than a one-size-fits-all approach. A heart condition or hearing loss might cause only mild cognitive effects in a man but could significantly erode a woman's thinking skills.
What You Can Do
You can take control of many of these risk factors. Monitor your blood pressure and weight, stay physically active, manage stress, and get hearing checked regularly—especially if you're a woman. Understanding your personal risk profile is the first step toward smarter brain health.
Source: ScienceDaily Mind & Brain
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