Black Americans face a risk of Alzheimer’s disease and other dementias that is roughly twice that of white Americans their age, and researchers are tracing that gap to a lifetime of discrimination, environmental hazards and unequal access to care and prevention. Studies link racism, neighborhood conditions and underfunded schools to higher rates of heart disease, vascular damage and ultimately cognitive decline in Black communities.
Scientists point to modifiable risks such as poor education, midlife obesity, sedentary lifestyles and air pollution as powerful drivers of dementia, but note that these harms fall disproportionately on Black and Hispanic neighborhoods that have been shaped by redlining and other racist policies. These communities are more likely to lack grocery stores and health-care facilities and to be ringed by highways and factories that worsen cardiovascular and brain health.
At the same time, the people most affected by dementia have been routinely excluded from the science meant to help them. Clinical trials for new Alzheimer’s treatments still include very few people of color, leaving doctors without the tools to interpret biomarkers or tailor interventions for Black patients who experience different patterns of vascular disease and brain changes than white men.
Projects such as the African American Dementia and Aging Project (AADAPt) in Oregon and the SHARP walking program in Portland’s historically redlined Albina district aim to close those gaps by centering Black experiences. By tracking discrimination, health histories and neighborhood ties, and by harnessing strong social connections as a protective force, these efforts seek not only to explain racial disparities in dementia but also to help Black communities reshape their own brain health futures.
See: “Prevention Intervention” (18 September 2025)
