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Dementia

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Leisure exercise cuts dementia risk, but work-related activity may raise it, large analysis finds
health4 hours ago

Leisure exercise cuts dementia risk, but work-related activity may raise it, large analysis finds

A large meta-analysis of 74 studies with 4.23 million people found that high levels of physical activity reduce dementia risk over about 10 years (RR around 0.80 for all-cause dementia), with leisure-time activities driving most of this benefit (RR ~0.76). In contrast, occupational physical activity and, in some cases, active commuting were linked to higher dementia risk, likely reflecting confounding factors such as education, job stress, environmental exposures, and reverse causation. The findings imply that not all activity confers the same brain benefits; voluntary, socially and cognitively engaging recreation may offer the strongest protection.

via MedPage Today|
#dementia#health#leisure-time-exercise
High-dose vitamin D linked to better cognition in older adults with sleep problems and MCI
health5 hours ago

High-dose vitamin D linked to better cognition in older adults with sleep problems and MCI

A small, observational study of 54 older adults with mild cognitive impairment and sleep problems found those taking 5,000 IU or more of vitamin D daily scored about 13% higher on the MoCA than nonusers, suggesting a potential link between vitamin D and cognitive health in this at-risk group. However, the study can’t prove causation and researchers urge larger clinical trials. The authors note that vitamin D needs vary, and a high dose should be discussed with a clinician; testing for deficiency and aiming to meet appropriate dietary/sun exposure sources are advised. The NIH upper intake level is about 4,000 IU/day for most adults.

via Medical News Today|
#cognition#dementia#health
Large UK Study Suggests HRT May Lower Dementia Risk in Women
health6 hours ago

Large UK Study Suggests HRT May Lower Dementia Risk in Women

A UK Biobank study of about 183,000 postmenopausal women followed for around 13 years found that those who used hormone replacement therapy (HRT) for at least one year had roughly 10% lower overall dementia risk and 16% lower Alzheimer’s risk compared with non-users, with the largest reduction (26%) among women who had undergone surgical menopause. However, the findings are observational and can’t establish causality; factors like education and other health variables may influence results. More research, including randomized trials, is needed, and women should consult their GP when considering starting or stopping HRT.

via The Guardian|
#alzheimers-disease#apoe4#dementia
Midlife brain-immune shift linked to higher dementia risk
health6 hours ago

Midlife brain-immune shift linked to higher dementia risk

A study of postmortem hippocampus tissue from 40 adults suggests that after about age 50 the brain’s resident immune cells (microglia) are increasingly replaced by blood-derived immune cells carrying stronger inflammatory signals, potentially driving neuroinflammation and dementia risk. The researchers also reported deterioration of blood-brain barrier–related cells and DNA/gene activity changes. While the findings hint at new therapeutic directions, the study’s small sample size and postmortem design mean it cannot establish causation or guide lifestyle changes.

via New York Post|
#aging#alzheimers-disease#brain
High-Dose Vitamin D Improves Cognitive Scores in Early Dementia Symptoms
health12 hours ago

High-Dose Vitamin D Improves Cognitive Scores in Early Dementia Symptoms

A small Emory University study of 54 older adults with sleep problems and mild cognitive impairment found that taking at least 5,000 IU of vitamin D daily was associated with about a 13% higher score on the Montreal Cognitive Assessment than those not taking vitamin D, suggesting potential brain health benefits from high-dose vitamin D, though the authors caution that the sample was small and larger studies are needed; vitamin D deficiency is common and supplementation should be discussed with a doctor, as interactions with other meds can occur.

via HuffPost|
#brain-health#cognitive-decline#dementia
CTE Found in at Least a Quarter of NFL Decedents, New BMJ Analysis Finds
health22 hours ago

CTE Found in at Least a Quarter of NFL Decedents, New BMJ Analysis Finds

A BMJ analysis of NFL brain donations from 2008–2021 shows that at least 24.5% of players who died between 2016–2021 had chronic traumatic encephalopathy (CTE), based on 215 positive diagnoses among 235 examined brains; the broader period yields an 18.5% minimum rate. CTE can only be diagnosed after death, and dementia was common among brain donors and correlated with CTE severity.

via The New York Times|
#bmj-study#brain-donations#cte
Rumer Willis Tests Alzheimer’s Risk with APOE Gene Analysis Amid Bruce Willis Dementia Battle
entertainment1 day ago

Rumer Willis Tests Alzheimer’s Risk with APOE Gene Analysis Amid Bruce Willis Dementia Battle

Rumer Willis took a ‘terrifying’ APOE genetic test with Function to gauge her Alzheimer’s risk, motivated by her father Bruce Willis’s frontotemporal dementia. She reported a “pretty average” score—there’s some risk but not extreme—and emphasized that having information is empowering, as she and her sisters continue to share updates on their father’s health and family history.

via Page Six|
#alzheimers-disease#apoe#bruce-willis
Early-Life Sugar Restriction Linked to Lower Dementia Risk Later in Life
health1 day ago

Early-Life Sugar Restriction Linked to Lower Dementia Risk Later in Life

A npj Aging study using WWII UK sugar-ration data links lower sugar intake during the first 1,000 days of life (conception to age 2) with reduced risks of dementia, Alzheimer’s disease, depression, and anxiety decades later. Analyzing 60,394 UK Biobank participants born 1951–1956, researchers found those born during sugar rationing had 27% lower dementia risk and 46% lower Alzheimer’s risk, with stronger effects if restriction occurred after birth. Brain scans showed younger-appearing brains and larger hippocampal and thalamic volumes. The study is observational and cannot prove causation, and the findings may not generalize to all groups. Authors caution against strict sugar limitations in pregnancy or childhood but suggest reduced early-life sugar could be a long-term brain-health investment.

via AOL.com|
#alzheimers-disease#brain-development#dementia
New study ties high CTE risk to former NFL players, urges safer head-impact limits
health1 day ago

New study ties high CTE risk to former NFL players, urges safer head-impact limits

A British Medical Journal study of 878 former NFL players who died from 2016–2021 found 215 of 235 brain donors had chronic traumatic encephalopathy (CTE). The researchers estimate CTE prevalence among all decedents ranged from 24.5% (minimum) to 97.7% (maximum), underscoring a higher risk of neurodegenerative disease and dementia in this population and urging the NFL to reduce repetitive head impacts across levels of play.

via BBC|
#cte#dementia#head-impacts
Vaccines May Slow Dementia: A Welsh Natural Experiment Sparks New Hope
health1 day ago

Vaccines May Slow Dementia: A Welsh Natural Experiment Sparks New Hope

A 2013 Welsh, age-based shingles-vaccine rollout created a natural experiment showing people offered the vaccine were about 20% less likely to develop dementia, with some data suggesting vaccines might also slow progression in those already with dementia. Across multiple vaccines (influenza, BCG, shingles, and others) there are growing links to lower dementia risk, likely via trained immunity that broadens immune protection. While promising, dementia vaccines face past trial failures and require coordinated, long-term research and funding before they can become a widespread preventive strategy.

via BBC Science Focus Magazine|
#dementia#health#immunotherapy
Dementia risk hinges on how you move: leisure activity protects, work-related activity may harm
health1 day ago

Dementia risk hinges on how you move: leisure activity protects, work-related activity may harm

A Lancet Public Health review of 74 studies (over 4.2 million people across 30 countries) finds that leisure-time physical activity—such as sports, dancing, or gym workouts—lowers dementia risk by about 24%, while occupational physical activity raises risk by about 20% and active commuting by about 10%, illustrating the 'physical activity paradox.' Benefits of leisure activity likely come from greater education, mental stimulation, and biological effects like improved blood flow and reduced inflammation; work-related activity can involve pollutants, stress, and fewer educational opportunities, which may undermine protection. The authors call for more research in low-income countries to understand these inequalities and drivers.

via The Conversation|
#brain-health#dementia#health
Three-Move Hand Test Gives Quick Clue to Dementia Risk
health1 day ago

Three-Move Hand Test Gives Quick Clue to Dementia Risk

A neurologist highlights the Luria (Three-Move) hand test—three simple gestures that assess motor function, sequencing, and executive function—as a quick at-home screen for cognitive issues. While not diagnostic, poor performance is linked to higher dementia risk (over half of Alzheimer’s patients and many with frontal-temporal dementia struggle), and results can prompt further screening (like SAGE) and exploration of emerging blood biomarker tests for early detection.

via New York Post|
#alzheimers-disease#cognitive-assessment#dementia