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 findings suggest that current prevention strategies, which often treat risk factors as universal, may overlook how women’s brains respond differently to common health stressors.
The study analyzed data from more than 17,000 adults over age 40 from the Health and Retirement Study, a large nationally representative U.S. cohort. Participants had an average 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.
Women showed 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, prevalence alone did not tell the full story. Several risk factors appeared to affect cognition more strongly in women, particularly hearing loss, hypertension, diabetes, and higher body mass index in midlife.
Hypertension stood out because it consistently showed a stronger link to worse cognitive performance in women. Researchers noted that women may face unique vascular stressors across their lives, including pregnancy complications, menopause-related hormonal changes, and higher rates of small vessel disease in the brain. Diabetes, though more common in men, also appeared to affect women’s cognition more significantly. Hearing loss followed a similar trend.
The study highlighted the connection between brain aging and cardiovascular and metabolic health, especially during and after menopause. As estrogen declines, women experience changes in blood vessels, cholesterol regulation, inflammation, insulin sensitivity, body fat distribution, and blood pressure. These changes affect both heart disease risk and brain health. Higher BMI in women in their 50s and 60s was linked to worse cognition, aligning with other research suggesting metabolic dysfunction during menopause may have long-term neurological effects.
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. Researchers are increasingly asking whether women’s brains may respond differently to 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. 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 declines 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. Treating hearing loss proactively is also important, as untreated hearing loss increases cognitive load, social withdrawal, and brain atrophy risk over time.
The study reinforces that dementia prevention may need to become more personalized, especially for women. The goal is paying attention to the systems that shape brain health throughout midlife, including vascular health, metabolic health, sleep, hearing, movement, inflammation, and mental health. The earlier those patterns are addressed, the more opportunity there may be to change the trajectory later on.
