Researchers have identified several dementia risk factors that appear to affect women more severely than men, according to a new study published in Alzheimer’s Research & Therapy.
The study, which analyzed data from more than 17,000 adults over age 40, found that women not only had higher rates of certain risk factors but also showed greater cognitive vulnerability to them. The research used information from the Health and Retirement Study, a large nationally representative U.S. cohort with an average participant age of 69.
Researchers examined 13 modifiable dementia risk factors, including depression, sleep quality, cholesterol, diabetes, smoking, hearing loss, blood pressure, obesity, physical inactivity, alcohol use, vision problems, education level, and social isolation. They compared how common these factors were in women versus men and how strongly they were linked to cognitive performance.
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. However, several risk factors appeared to affect cognition more strongly in women, particularly hearing loss, hypertension, diabetes, and higher body mass index in midlife.
Cardiometabolic Health and Brain Aging
The study highlighted the connection between brain aging and 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. These changes affect both heart disease risk and brain health.
Hypertension showed a stronger association with worse cognitive performance in women. Researchers noted 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.
Diabetes, while more common in men, appeared to affect women’s cognition more significantly. Hearing loss followed a similar trend. Higher BMI was associated with worse cognition for women in their 50s and 60s, aligning with research suggesting metabolic dysfunction during menopause may have long-term neurological consequences.
Nearly two-thirds of people living with Alzheimer’s disease are women. While women live longer than men on average, longevity alone does not explain this disparity. Scientists have been working to understand why women’s brains may respond differently to common health stressors long before memory problems appear.
Many of the biggest drivers of cognitive decline are technically modifiable, including sleep, blood pressure, physical activity, depression, metabolic health, and hearing loss. However, most prevention advice still treats these risk factors as if they affect everyone equally.
Addressing Brain Health
Cardiovascular fitness remains one of the most protective factors for long-term brain health. Regular aerobic exercise improves blood flow, insulin sensitivity, vascular flexibility, inflammation, and sleep quality. Strength training also matters, particularly during midlife when muscle mass starts declining and metabolic health becomes more vulnerable.
Sleep deserves more attention in dementia prevention conversations. 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.
The study also reinforced the importance of treating hearing loss proactively rather than dismissing it as a normal part of aging. Researchers view untreated hearing loss as a major cognitive stressor because it increases cognitive load, social withdrawal, and brain atrophy risk over time.
Many habits that support brain health also make a noticeable difference in how women feel day to day, including better sleep, more stable energy, improved mood, stronger workouts, better blood sugar control, and more mental clarity.
The research suggests dementia prevention may need to become more personalized, especially for women. Paying attention to systems that shape brain health throughout midlife, such as vascular health, metabolic health, sleep, hearing, movement, inflammation, and mental health, could help change the trajectory of cognitive decline later on.
