Dementia

Stress Internalization Predicted Memory Decline in 1,528 Older Chinese Americans Across Three Waves

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Stress Internalization Predicted Memory Decline in 1,528 Older Chinese Americans Across Three Waves

TL;DR: A 2025 study in The Journal of Prevention of Alzheimer’s Disease found that stress internalization, not acculturation or activity engagement, predicted memory decline across three waves in 1,528 older Chinese Americans. Key Findings Stress internalization predicted longitudinal memory decline: A latent factor combining greater perceived stress, greater hopelessness, and lower conscientiousness was the single …

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Generational Memory Gains May Help Explain Declining Dementia Incidence

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Generational Memory Gains May Help Explain Declining Dementia Incidence

TL;DR: A 2026 preprint longitudinal cohort analysis in medRxiv found that later-born cohorts showed higher memory levels entering old age and slower rates of memory decline, while the projected 20-year cohort advantage at age 80 was large enough in the model to account for a reported 13% per-decade decline in dementia incidence. Key Findings Birth-cohort …

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New-Onset Loneliness Accelerated Cognitive Decline in 635 Older Adults: ELSA Longitudinal Analysis

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New-Onset Loneliness Accelerated Cognitive Decline in 635 Older Adults: ELSA Longitudinal Analysis

TL;DR: A 2026 longitudinal analysis in the Journal of Affective Disorders tracked 635 older adults with new-onset loneliness and found that cognitive decline matched controls before loneliness began, then accelerated after onset, especially when loneliness persisted. Key Findings Pre-loneliness cognitive trajectories were identical: Before the first reported episode of loneliness, cognitive scores in 635 future-lonely …

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AT(N) Blood Biomarkers Were Often Abnormal in Older Adults With Epilepsy

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AT(N) Blood Biomarkers Were Often Abnormal in Older Adults With Epilepsy

TL;DR: A 2026 medRxiv preprint applied the AT(N) framework, an Alzheimer’s disease biomarker system for amyloid, tau, and neurodegeneration, to 84 older adults with focal epilepsy and found that only 32.1% had normal blood biomarkers, while early-onset epilepsy carried higher odds of biomarker abnormality. Key Findings Epilepsy cohort: Researchers analyzed focal epilepsy participants from the …

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Virgin Olive Oil Linked Gut Microbes to Cognition

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Virgin Olive Oil Linked Gut Microbes to Cognition

TL;DR: A 2026 study in Microbiome found that in older adults at metabolic risk, virgin olive oil was linked to better cognitive preservation and richer gut microbiota, while common refined olive oil pointed the other way. Key Findings Metabolic-risk cohort tracked over time: The analysis followed 656 older adults who were 55-75 years old, cognitively …

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Redox Switches Amplified Alzheimer’s Neuroinflammation

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Redox Switches Amplified Alzheimer’s Neuroinflammation

TL;DR: A 2026 study in Cell Chemical Biology found that alzheimer’s inflammation may be driven by a specific chemical switch: S-nitrosylation of STING at cysteine 148, which pushed innate immune signaling toward synaptic damage. Key Findings STING carried the redox switch: The study identified S-nitrosylation of human STING at cysteine 148 as a redox modification …

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Midlife Vitamin D Linked to Lower Brain Tau Decades Later

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Midlife Vitamin D Linked to Lower Brain Tau Decades Later

TL;DR: A 2026 study in Neurology Open Access found that in 793 dementia-free adults, higher vitamin D levels around age 39 were associated with less tau readout on PET brain imaging about 16 years later, while amyloid beta did not show the same relationship. Key Findings 793 dementia-free adults: Participants had vitamin D measured in …

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Three Blood p-tau217 Tests All Nailed Alzheimer’s Diagnosis

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Three Blood p-tau217 Tests All Nailed Alzheimer's Diagnosis

TL;DR: A 2026 study in Translational Psychiatry found that three different plasma p-tau217 assays separated Alzheimer’s dementia from controls and frontotemporal degeneration with excellent accuracy, shifting the test from whether the marker works to which platform clinics can deploy. Key Findings Three p-tau217 assays all performed strongly: The cohort included 39 cognitively unimpaired controls, 28 …

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Orbitofrontal Atrophy Rating Improved bvFTD Diagnostic Certainty

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Orbitofrontal Atrophy Rating Improved bvFTD Diagnostic Certainty

TL;DR: A 2026 Alzheimer’s & Dementia: Diagnosis, Assessment & Disease Monitoring study found that orbitofrontal and frontoinsular visual rating scales on MRI helped distinguish possible from probable behavioral variant frontotemporal dementia. Key Findings bvFTD cohort: The study included 93 probable and 15 possible bvFTD patients, plus healthy controls for cross-sectional comparisons. Best regions: Orbitofrontal and …

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Alzheimer’s Capillary Blood Biomarkers Correlated With Cognition

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Alzheimer's Capillary Blood Biomarkers Correlated With Cognition

TL;DR: A 2026 study in Nature Communications found that self-administered finger-prick blood tests for phosphorylated tau 217 (p-tau217), an Alzheimer’s tau marker, and glial fibrillary acidic protein (GFAP), an astrocyte-injury marker, correlated with cognition and function in older adults. Key Findings Remote sampling: Participants used capillary finger-prick blood collection rather than standard clinic-based venous blood …

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