Researchers conducted a large, two-stage meta-analysis of genome-wide association studies in individuals of European ancestry.
Evidence: low
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27,780 Alzheimer's and dementia studies in plain English, each scored out of 100.
Researchers conducted a large, two-stage meta-analysis of genome-wide association studies in individuals of European ancestry.
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
A summary measure of γ-secretase activity (γ-secretase composite [GSC]) was calculated for each variant and compared with clinical history-derived AAO using correlation analyses. 3 key findings →
Design: cross-sectional Participants: 190 Evidence: moderate
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We used a protein quantitative trait analysis in monocytes from 226 individuals to evaluate cross-talk between Alzheimer loci. 2 key findings →
Participants: 226 Evidence: low
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In 2018, Carlos et al. [2] reviewed 21 studies from the SUN project that focused on the association between the MDP and several incident chronic diseases, concluding that high Mediterranean diet adherence was associated with a lower incidence of all-cause mortality, cardiovascular disease, type 2 diabetes, weight gain, metabolic syndrome, depression, cognitive decline, and nephrolithiasis, and with a lower heart rate and mitigation of the effects of obesity on cardiovascular disease (CVD) and type 2 diabetes, and our results suggested that the Mediterranean diet may improve fertility. 5 key findings →
Design: cohort study Participants: 79 Evidence: moderate
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We present a comprehensive global analysis of genetic variants associated with autosomal-dominant Alzheimer's disease (ADAD). 2 key findings →
Participants: 550 Evidence: low
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Age-associated changes in brain imaging and fluid biomarkers are characterized and compared in presenilin 1 (PSEN1)E280A mutation carriers and noncarriers from the world's largest known autosomal dominant Alzheimer disease (AD) kindred. 4 key findings →
Design: cross-sectional Evidence: low
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Altered processing of the amyloid precursor protein (APP) is a central event in the formation of amyloid deposits in the brains of individuals with Alzheimer's disease. 3 key findings →
Evidence: low
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Missense mutations in the presenilin 1 (PS1) gene cause the most common form of dominant early-onset familial Alzheimer's disease (FAD) and are associated with increased levels of amyloid beta-peptides (A beta) ending at residue 42 (A beta 42) in plasma and skin fibroblast media of gene carriers. 4 key findings →
Evidence: low
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Converging evidence suggests that the accumulation of cerebral amyloid beta-protein (Abeta) in Alzheimer's disease (AD) reflects an imbalance between the production and degradation of this self-aggregating peptide. 3 key findings →
Evidence: low
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Ordered assembly of the amyloid-beta protein (A beta) into amyloid fibrils is a critical step in Alzheimer's disease (AD). 4 key findings →
Evidence: low
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Overexpression of the familial Alzheimer's disease gene Presenilin 2 (PS2) in nerve growth factor-differentiated PC12 cells increased apoptosis induced by trophic factor withdrawal or beta-amyloid. 4 key findings →
Evidence: low
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Although pathogenic variants in PSEN1 leading to autosomal-dominant Alzheimer disease (ADAD) are highly penetrant, substantial interindividual variability in the rates of cognitive decline and biomarker change are observed in ADAD. 3 key findings →
Design: cross-sectional Evidence: moderate
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Alzheimer disease (AD) is the most common cause of dementia in older individuals (>65 years) and has a long presymptomatic phase. 4 key findings →
Evidence: low
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The cellular mechanism underlying the generation of beta-amyloid in Alzheimer disease and its relationship to the normal metabolism of the amyloid precursor protein are unknown. 4 key findings →
Evidence: low
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Alzheimer's disease (AD) is a genetically complex disorder that accounts for the majority of dementia in the elderly population. 4 key findings →
Evidence: low
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Human genetic data have associated angiotensin-converting enzyme (ACE) with Alzheimer disease (AD), and purified ACE has been reported to cleave synthetic amyloid beta-protein (Abeta) in vitro. 4 key findings →
Evidence: low
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Alzheimer disease (AD) is characterized neuropathologically by intracellular neurofibrillary tangles (NFT) and of extracellular senile plaques (SP), the central core of which is amyloid beta-peptide (Abeta) derived from amyloid precursor protein (APP), a transmembrane protein. 4 key findings →
Evidence: low
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The Dominantly Inherited Alzheimer Network Observational Study (DIAN Obs) is a longitudinal, global cohort study investigating brain aging and autosomal dominant Alzheimer’s disease (ADAD), a rare monogenic form of Alzheimer’s disease (AD). 5 key findings →
Design: cohort study Evidence: moderate
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Progressive cerebral deposition of extracellular filaments composed of the beta-amyloid protein (beta AP) is a constant feature of Alzheimer disease (AD). 4 key findings →
Evidence: low
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The amyloid precursor protein (APP) has been associated with Alzheimer's disease (AD) because APP is processed into the beta-peptide that accumulates in amyloid plaques, and APP gene mutations can cause early onset AD. 4 key findings →
Evidence: low
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Free full text links and the Full text may need a subscription label come from Unpaywall, Europe PMC and OpenAlex records of free copies, checked 10 Oct 2026. A study with neither is unknown, not paywalled. Show only studies that are free to read
This is alzhub's own score. It is not an official metric, not an impact factor, and no journal, publisher or ranking body endorses it. We built it so that a reader who is not a scientist can tell a landmark trial from a conference abstract without having to already know the difference. Every point comes from one of 20 components, all of them printed on the study itself, so you can disagree with our arithmetic rather than having to trust the total.
Journals are placed in ordered tiers, never given a numeric impact factor — we could not verify current impact factors from a source we control, and an invented one would be worse than none. Tier 1 is the top-tier general journals (NEJM, The Lancet, JAMA, Nature, Science, Nature Medicine); tier 2 is the leading specialty journals; tier 3 is every other peer-reviewed journal. A separate part scores how much the journal's own papers are cited, which tells the tier-3 journals apart.
Two rules we don't bend. First, we never fill in a missing value: if a record does not state a sample size or a design, that component scores zero, and if we simply have no data for a part, such as a citation count, that part is left out and the study is scored on the parts we could check. The study card says which. Second, anything that is not a peer-reviewed article is capped at 16/100 and carries a warning chip — so a conference abstract or a company press release can never outrank a peer-reviewed paper, no matter how good it looks.
We rank a rigorous null result — a good trial showing that something does not work — above an early positive finding. Someone deciding whether to buy a supplement is served by that, and the rigour is already counted by the design and journal components.
The score is computed from the published data alone and is reproducible: the same file always yields the same numbers.
See the whole rubric drawn out → — four charts covering all 27,780 studies: how the scores are spread and where the cap bites, which of the 20 components the library is strong and weak on, which subjects rest on stronger evidence, and what kinds of study each subject is actually built from.
This is a large sample of the Alzheimer's literature, not an exhaustive index of it. It holds 27,780 records, built mostly from automated pulls of Europe PMC (61.1% of the library) and OpenAlex (18.3%), plus smaller pulls from PubMed, Crossref and medRxiv. If a study, a drug, or a finding isn't here, that is not evidence it doesn't exist in the literature — it may simply not have been pulled in yet.
1,034 records (3.7% of the library) are not peer-reviewed — 962 of those are preprints posted before any journal review, and the rest are conference abstracts, regulatory notices and reports. Every study card on this page states its status plainly, and the score above is capped for anything that isn't a peer-reviewed article.
See the full, machine-readable breakdown of this library's coverage →