Exercise training is an important strategy to counteract cognitive and brain health decline during aging. 1 key finding →
Design: meta-analysis Evidence: high
Full summary, score breakdown and related studies → Original source
27,380 Alzheimer's and dementia studies in plain English, each scored out of 100.
Exercise training is an important strategy to counteract cognitive and brain health decline during aging. 1 key finding →
Design: meta-analysis Evidence: high
Full summary, score breakdown and related studies → Original source
Alzheimer's disease (AD) is a debilitating, chronic neurodegenerative disease. 2 key findings →
Design: meta-analysis Evidence: high
Full summary, score breakdown and related studies → Original source
Alzheimer's disease (AD) is a progressive age-related neurodegenerative disease. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Abundant tau-positive neurofibrillary lesions constitute a defining neuropathological characteristic of Alzheimer's disease. 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Full text may need a subscription
Alzheimer's disease (AD), Parkinson's disease (PD), and amyotrophic lateral sclerosis with associated frontotemporal dementia (ALS/FTD) are major neurodegenerative diseases for which there are no cures. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Age-related hearing loss (ARHL) is a common problem for older adults, leading to communication difficulties, isolation, and cognitive decline. 5 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Parkinson's disease (PD) and frontotemporal dementia/amyotrophic lateral sclerosis (FTD/ALS) are insidious and incurable neurodegenerative diseases that represent a significant burden to affected individuals, caregivers, and an ageing population. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
'Amygdala' and 'amygdalar complex' are terms that now refer to a highly differentiated region near the temporal pole of the mammalian cerebral hemisphere. 5 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Full text may need a subscription
Diabetes mellitus is associated with cognitive deficits and an increased risk of dementia, particularly in the elderly. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source Full text may need a subscription
The colony-stimulating factor-1 receptor (CSF-1R) kinase regulates tissue macrophage homeostasis, osteoclastogenesis, and Paneth cell development. 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Neurodegenerative diseases have long been considered distinct proteinopathies: amyloid-β and tau in Alzheimer's disease, α-synuclein in Parkinson's disease, and TDP-43 in amyotrophic lateral sclerosis. 5 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
The cholinergic system is one of the most important modulatory neurotransmitter systems in the brain and controls activities that depend on selective attention, which are an essential component of conscious awareness. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Full text may need a subscription
The discovery in the late 1970s that cholinergic neurons in the basal forebrain degenerate in Alzheimer's disease (AD) greatly accelerated research on the role of cholinergic mechanisms in learning and memory. 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Full text may need a subscription
Epidemiological evidence demonstrates a link between air pollution exposure and the onset and progression of cognitive impairment and Alzheimer's disease (AD). 5 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Traditionally, lymphocytic interferon γ (IFN-γ) was considered to be a simple 'booster' of proinflammatory responses by microglia (brain-resident macrophages) during bacterial or viral infection. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Aging-related cognitive decline represents a critical risk factor for the development of dementia and is associated with global neurophysiological changes. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Mechanisms of epigenetic regulation, including DNA methylation, chromatin remodeling, and histone post-translational modifications, are involved in multiple aspects of neuronal function and development. 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Neurons affected in Alzheimer's disease (AD) experience mitochondrial dysfunction and a bioenergetic deficit that occurs early and promotes the disease-defining amyloid beta peptide (Aβ) and Tau pathologies. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Recent evidence indicates that apolipoprotein E (ApoE) plays a central role in the hippocampal response to injury. 3 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Various mutations in the amyloid protein precursor and presenilin genes can lead to early onset, autosomal Alzheimer's disease. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source
Perturbed neuronal Ca(2+) homeostasis is implicated in age-related cognitive impairment and Alzheimer's disease (AD). 5 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Sleep disruption appears to be a core component of Alzheimer's disease (AD) and its pathophysiology. 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
The cytokine interleukin 1 (IL-1) has diverse actions in the brain. 5 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Despite decades of intensive research, the biological mechanisms that causally underlie depression are still unclear, and therefore the development of novel effective antidepressant treatments is hindered. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source
Brain-derived neurotrophic factor (BDNF) and serotonin (5-hydroxytryptamine, 5-HT) are known to regulate synaptic plasticity, neurogenesis and neuronal survival in the adult brain. 5 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
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 27,380 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 27,380 records, built mostly from automated pulls of Europe PMC (60.6% of the library) and OpenAlex (18.6%), 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.
1,032 records (3.8% 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 →