Researchers have identified several dementia risk factors that may affect women more severely than men, according to a new study published in Alzheimer’s Research & Therapy.
Women live longer than men on average, but that does not fully explain why nearly two-thirds of people living with Alzheimer’s disease are women. Scientists have been investigating this question for years, and the conversation is shifting. Instead of treating dementia risk as a universal equation, researchers are asking whether women’s brains respond differently to common health stressors long before memory problems appear.
Many of the biggest drivers of cognitive decline are technically modifiable. Sleep, blood pressure, physical activity, depression, metabolic health, and hearing loss all play a role. The problem is that most prevention advice still treats those risk factors as if they affect everyone equally.
The new study analyzed data from more than 17,000 adults and found that women not only experienced higher rates of several dementia risk factors but in some cases appeared more cognitively vulnerable to them than men.
Researchers used data from the Health and Retirement Study, a large nationally representative U.S. cohort, to examine 13 modifiable dementia risk factors in adults over age 40. The analysis included more than 17,000 participants with an average age of 69. Researchers looked at factors including depression, sleep quality, cholesterol, diabetes, smoking, hearing loss, blood pressure, obesity, inactivity, alcohol use, vision problems, education level, and social isolation.
They compared two things: how common these risk factors were in women versus men, and how strongly they were linked to cognitive performance. The differences were hard to ignore.
Women had higher rates of elevated cholesterol, depression, physical inactivity, smoking, poor sleep, poor vision, and lower educational attainment. Men had higher rates of diabetes, hearing loss, and heavy alcohol use. But prevalence alone did not tell the whole story.
Several risk factors appeared to affect cognition more strongly in women, particularly hearing loss, hypertension, diabetes, and higher BMI in midlife. Women did not just experience some of these conditions more often; their brains also seemed more affected by them over time.
Cardiometabolic health and the brain
One important thread running through this research is how closely brain aging appears tied to cardiovascular and metabolic health, especially during and after menopause. As estrogen declines, women experience shifts in blood vessels, cholesterol regulation, inflammation, insulin sensitivity, body fat distribution, and blood pressure. Those changes do not just affect heart disease risk. They shape brain health, too.
Hypertension stood out in this study because it consistently showed a stronger association with worse cognitive performance in women. Researchers point out that women may experience unique vascular stressors across their lifespan, including pregnancy complications, menopause-related hormonal changes, and higher rates of small vessel disease in the brain.
The same pattern appeared with diabetes and hearing loss. Even though diabetes was more common in men, it appeared to affect women’s cognition more significantly. Hearing loss followed a similar trend.
There is also growing interest in the relationship between visceral fat, insulin resistance, and Alzheimer’s disease risk in women during midlife. In this study, higher BMI was associated with worse cognition for women in their 50s and 60s, which aligns with other research suggesting metabolic dysfunction during menopause may have long-term neurological consequences.
What women can do
Many of the biggest drivers of long-term brain health are things women can influence. Cardiovascular fitness remains one of the most protective things women can prioritize. Regular aerobic exercise improves blood flow, insulin sensitivity, vascular flexibility, inflammation, and sleep quality simultaneously. Strength training matters too, particularly during midlife when muscle mass starts declining and metabolic health becomes more vulnerable.
Sleep deserves more attention in dementia prevention conversations than it usually gets. Chronic poor sleep affects blood sugar regulation, inflammation, memory consolidation, and the brain’s ability to clear metabolic waste products linked to Alzheimer’s disease.
This study also reinforces the importance of treating hearing loss proactively instead of dismissing it as a normal part of aging. Researchers are starting to view untreated hearing loss as a major cognitive stressor because it increases cognitive load, social withdrawal, and brain atrophy risk over time.
Many of the habits that support brain health also make a noticeable difference in how women feel day to day. Better sleep, more stable energy, improved mood, stronger workouts, better blood sugar control, and more mental clarity are all connected. Healthier aging does not happen in isolated systems, and the same things that support the brain often support the rest of the body.
Personalized prevention
One of the clearest messages from this research is that dementia prevention may need to become far more personalized, especially for women. The goal is no longer just avoiding memory loss decades from now. It is paying attention to the systems that shape brain health throughout midlife, such as vascular health, metabolic health, sleep, hearing, movement, inflammation, and mental health.
This research suggests that women’s brains may respond differently to these stressors across the lifespan. The earlier those patterns are addressed, the more opportunity there may be to change the trajectory later on.
