27,380 Alzheimer's and dementia studies in plain English, each scored out of 100.
Significantly, technological advancement has also changed the character of particulate pollution, increasing the proportion of nanometer-sized particles--"nanoparticles"--and expanding the variety of chemical compositions. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Air pollution has been implicated as a chronic source of neuroinflammation and reactive oxygen species (ROS) that produce neuropathology and central nervous system (CNS) disease. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source
Air pollution is a complex mixture of gases (e.g., ozone), particulate matter, and organic compounds present in outdoor and indoor air. 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Exposure to complex mixtures of air pollutants produces inflammation in the upper and lower respiratory tract. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source
The etiology of most neurodegenerative disorders is multifactorial and consists of an interaction between environmental factors and genetic predisposition. 5 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Acute, subchronic, or chronic exposures to particulate matter (PM) and pollutant gases affect people in urban areas and those exposed to fires, disasters, and wars. 3 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Air pollution exposures have been linked to neuroinflammation and neuropathology. 3 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
In the present review we summarize recent advances in the understanding of the interaction between genetics and environmental factors involved in complex multi-factorial neurodegenerative disorders such as Alzheimer's disease (AD), Parkinson's disease (PD) and Amyotrophic Lateral Sclerosis (ALS). 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Air pollution (indoors and outdoors) is a major issue in public health as epidemiological studies have highlighted its numerous detrimental health consequences (notably, respiratory and cardiovascular pathological conditions). 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source
Organophosphate pesticides (OPs) are used extensively throughout the world. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source
Humans are routinely exposed to a vast array of environmental neurotoxicants, including pesticides, endocrine disrupters, and heavy metals. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Millions of urban children are chronically exposed to high concentrations of air pollutants, i.e., fine particulate matter (PM2.5) and ozone, associated with increased risk for Alzheimer's disease. 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Exposures to particulate matter and gaseous air pollutants have been associated with respiratory tract inflammation, disruption of the nasal respiratory and olfactory barriers, systemic inflammation, production of mediators of inflammation capable of reaching the brain and systemic circulation of particulate matter. 5 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
There has been a steep increase in the prevalence of dementia in recent decades, which has roughly followed an increase in pesticide use some decades earlier, a time when it is probable that current dementia patients could have been exposed to pesticides. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source
Millions of children are exposed to concentrations of air pollutants, including fine particulate matter (PM2.5), above safety standards. 3 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Neurodegenerative disease occurs more frequently in some occupations than in others, and this distribution, which may indicate occupational risk factors, should be further investigated. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source
Exposure to fine particulate matter (PM2.5) and ozone (O3) above US EPA standards is associated with Alzheimer's disease (AD) risk, while Mn toxicity induces parkinsonism. 3 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Parkinson's disease (PD) is the most common cause of the parkinsonian syndromes and the most frequent neurodegenerative disease after Alzheimer's disease. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Human biomonitoring provides an efficient and cost-effective way to identify and quantify exposure to chemical substances, including those having deleterious eff ects on human organisms. 3 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Hyper-aluminemia often develops in patients with renal failure being treated with intermittent hemodialysis on a chronic basis, and in severe cases results in an encephalopathy. 5 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
The chronic health effects associated with sustained exposures to high concentrations of air pollutants are an important issue for millions of megacity residents and millions more living in smaller urban and rural areas. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source
Children's urban air pollution exposures result in systemic and brain inflammation and the early hallmarks of Alzheimer's disease (AD). 5 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Alzheimer's disease (AD) is a progressive neurodegenerative disease that affects millions in the aging population worldwide and will affect millions more in the next 20 years. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source
In January 2004, the normally picturesque Cache Valley in northern Utah made national headlines with the highest PM2.5 levels in the nation. 3 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Living in locations with higher PM2.5 (per interquartile range [IQR]=3.17μg/m3) or NO2 (per IQR=6.63ppb) was associated with greater MTL atrophy (βPM2.5 = -0.29, 95% confidence interval [CI]=[-0.41,-0.18]; βNO2 =-0.12, 95%CI=[-0.23,-0.02]). 5 key findings →
Design: longitudinal study Participants: 627 Evidence: moderate
Full summary, score breakdown and related studies → Original source
9 of the 237 studies in this tag, picked by a fixed rule (a hash of each study's address), not by score or date; each page of this list shows a different 9. The same 9 appear here every time.
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 →