All articles tagged with #dementia risk
A study of 2,192 Australian adults found that every 10% increase in calories from ultra-processed foods is linked to a small drop in attention and a higher dementia risk, with effects persisting even for those following a Mediterranean-style diet; causation isn't proven, but the findings add to concerns about ultra-processed foods and cognitive health.
An observational study of 2,192 dementia-free Australians aged 40–70 found that ultra-processed foods made up about 41% of total energy intake and were associated with poorer attention and higher dementia risk. Specifically, every 10% increase in ultra-processed foods correlated with a ~0.05-point drop in attention and ~0.24-point higher dementia risk scores. The findings suggest processing itself may affect cognitive health beyond nutrients; adherence to a Mediterranean diet did not offset the effect. Causality can’t be established, and further research is needed.
A Monash University-led study of more than 2,000 dementia-free Australians aged 40–70 found that each 10% rise in ultraprocessed food intake was associated with lower attention scores and higher dementia risk, even among people with generally healthy diets; memory effects were not observed. Self-reported data and potential confounding limit the strength of conclusions. Researchers and experts, including Dr. Daniel Amen, call for dietary guidelines to consider processing level and for replacing ultraprocessed foods with real foods to protect brain health.
A cross-sectional study of 2,192 dementia-free Australian adults finds that each 10% rise in ultra-processed food (UPF) intake is tied to lower visual attention scores and higher dementia risk, independent of overall diet quality. The impact persists even among those following a healthy Mediterranean pattern, suggesting that the degree of food processing itself may drive cognitive decline via additives and processing chemicals. The study shows association, not causation, but highlights attention as a foundation for learning and a potential early dementia risk factor.
An observational six-year study of more than 1,200 Australians aged 60+ found higher baseline dietary sodium linked to faster decline in episodic recall in men, but not in women, suggesting salt may be a modifiable factor in cognitive aging; however, causation cannot be established and the findings come with limitations like reliance on baseline sodium data and a predominantly Caucasian sample.
A study of 793 adults found higher vitamin D levels in midlife (around age 39) were associated with fewer tau protein tangles in brain scans about 16 years later; there was no link with amyloid-beta. The results show association, not causation, and researchers say clinical trials are needed to determine if vitamin D supplementation could help reduce dementia risk.
Gardening may benefit brain health in older adults by combining physical exercise, mental engagement, and stress reduction; while not a guaranteed dementia preventer, it aligns with other risk-reduction strategies such as managing cardiometabolic health, lifelong learning, social connection, about 150 minutes of moderate activity weekly, a brain-healthy diet (Mediterranean or DASH), and addressing hearing loss.
A large study of nearly 28 million Medicare beneficiaries (2000–2018) finds that higher long-term exposure to air pollution is associated with greater risk of Alzheimer’s disease and dementia, with stronger effects in people who had a stroke. While pollution is not the sole cause of Alzheimer’s, the findings support air-quality interventions and suggest indoor air improvements, such as HEPA-filter purifiers, alongside lifestyle measures like regular exercise, cognitive engagement, and social activity to help reduce risk.
An eight-year study of 12,772 adults (mean age ~52) found that higher consumption of several low- and no-calorie sweeteners (except tagatose) is linked to faster cognitive decline, especially among those under 60 and people with diabetes. The results show correlation, not causation, and health authorities say approved sweeteners remain safe while further research is needed.
A Medicare study of about 1.9 million older adults (2016–2022) found cerebral amyloid angiopathy (CAA)—amyloid buildup in brain vessels—nearly quadruples five‑year dementia risk, with or without prior stroke. CAA alone raised dementia risk to ~4.3× and stroke alone to ~2.4×; having both CAA and stroke increased risk to ~4.5×. The results imply non-stroke mechanisms drive cognitive decline in CAA and underscore the need for early cognitive screening after diagnosis. Limitations include reliance on claims data and lack of imaging, with findings reported as an ASA conference abstract rather than a peer‑reviewed study.
A study from Wake Forest University found that living in disadvantaged neighborhoods with higher social and environmental burdens is associated with biological changes in the brain that increase dementia risk, especially among Black populations, highlighting the impact of social inequities on brain health.
A recent study suggests that daily calcium supplements do not increase the risk of dementia in women aged 70 and older, supporting their safety for bone health without added cognitive risk, though further research is needed to confirm these findings across diverse groups.
A new study suggests a link between obesity and Alzheimer's disease, highlighting how fat cell-derived vesicles may promote plaque formation in the brain, though causation is not yet established. Maintaining a healthy weight, exercising, and engaging the brain are recommended to reduce dementia risk.
Consuming half a teaspoon of extra virgin olive oil with warm water daily may improve memory and reduce the risk of dementia, thanks to its healthy fats and polyphenols that support brain health and reduce oxidative stress. Regular intake, especially on an empty stomach, can be beneficial, but individuals should consider personal health conditions and consult a doctor if on blood thinners.
Research from Pennsylvania State University shows that significant year-to-year weight fluctuations in people over 65 are linked to faster cognitive decline, emphasizing the importance of regular weight monitoring in older adults to potentially mitigate dementia risk.