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  • Alzheimer's Association 24/7 Helpline 800-272-3900 24 hours a day, 365 days a year Free, confidential support and information for people with dementia, caregivers, families and the public. Master's-level clinicians. Also Spanish.
  • 988 Suicide & Crisis Lifeline 988 24/7 Call or text 988, or chat at 988lifeline.org. For anyone in emotional distress or a mental-health crisis, including caregivers.
  • Alzheimer's Foundation of America (AFA) Helpline 866-232-8484 9:00 am - 9:00 pm ET, seven days a week Licensed social workers providing support, info and referrals. Also text message and web chat. Text: 646-586-5283

In a medical emergency, call 911. More numbers, and what each line does, on the help page.

Each study has a usefulness score out of 100 (rubric version 4.0). Tap a score to see what makes it up.

Highest usefulness score first. Studies without a score come last.

  1. The gut microbiome in neurological disorders

    ✓ Peer-reviewed alzhub usefulness score 55 out of 100. The Lancet. Neurology 2019-11-18 Disease mechanisms

    Research into the role of the gut microbiome in modulating brain function has rapidly increased over the past 10 years, albeit chiefly in animal models.

  2. At baseline, subjects with normal vs. impaired cognition show no notable difference in microbiome diversity but several unique microbial signatures are detected in subjects with mild cognitive impairment.

  3. Changes of Colonic Bacterial Composition in Parkinson's Disease and Other Neurodegenerative Diseases

    ✓ Peer-reviewed alzhub usefulness score 55 out of 100. Nutrients 2018-06-01 Disease mechanisms

    In recent years evidence has emerged that neurodegenerative diseases (NDs) are strongly associated with the microbiome composition in the gut.

  4. Gout and the risk of dementia: a nationwide population-based cohort study

    ✓ Peer-reviewed alzhub usefulness score 55 out of 100. Arthritis research & therapy 2015-05-28 Digital health tools

    Patients with gout have a lower risk of developing dementia.

  5. Effect of fish oil on cognitive performance in older subjects

    ✓ Peer-reviewed alzhub usefulness score 55 out of 100. Neurology 2008-08-04 Clinical trials

    The mean age of the participants was 70 years, and 55% were male.

  6. Microbiota-gut-brain axis in health and neurological disease: Interactions between gut microbiota and the nervous system

    ✓ Peer-reviewed alzhub usefulness score 54 out of 100. Journal of cellular and molecular medicine 2024-09 Disease mechanisms

    Along with mounting evidence that gut microbiota and their metabolites migrate endogenously to distal organs, the 'gut-lung axis,' 'gut-brain axis,' 'gut-liver axis' and 'gut-renal axis' have been established.

  7. Irritable Bowel Syndrome Is Associated with an Increased Risk of Dementia: A Nationwide Population-Based Study

    ✓ Peer-reviewed alzhub usefulness score 53 out of 100. PloS one 2016-01-05 Digital health tools

    IBS is associated with an increased risk of dementia, and this effect is obvious only in patients who are ≥50 years old.

  8. Dementia and metabolic syndrome: a bibliometric analysis

    ✓ Peer-reviewed alzhub usefulness score 52 out of 100. Frontiers in aging neuroscience 2024-06-12 Risk factors

    A total of 717 articles were identified, showing an upward trend in annual publications.

  9. Dysbiosis, gut barrier dysfunction and inflammation in dementia: a pilot study

    ✓ Peer-reviewed alzhub usefulness score 52 out of 100. BMC Geriatrics 2020-07-20 Disease mechanisms

    Dementia was associated with dysbiosis characterized by differences in beta diversity and changes in taxonomic composition.

  10. Altered bile acid profile in mild cognitive impairment and Alzheimer's disease: Relationship to neuroimaging and CSF biomarkers

    ✓ Peer-reviewed alzhub usefulness score 52 out of 100. Alzheimer's & dementia : the journal of the Alzheimer's Association 2018-10-15 Biomarkers

    This is the first study to show serum-based BA metabolites are associated with "A/T/N" AD biomarkers, providing further support for a role of BA pathways in AD pathophysiology.

  11. Altered bile acid profile associates with cognitive impairment in Alzheimer's disease-An emerging role for gut microbiome

    ✓ Peer-reviewed alzhub usefulness score 52 out of 100. Alzheimer's & dementia : the journal of the Alzheimer's Association 2018-10-15 Risk factors

    We report for the first time an association between altered BA profile, genetic variants implicated in AD, and cognitive changes in disease using a large multicenter study.

  12. Emerging links between type 2 diabetes and Alzheimer's disease

    ✓ Peer-reviewed alzhub usefulness score 52 out of 100. World journal of diabetes 2015-06-01 Drug development

    Type 2 diabetes mellitus and Alzheimer's disease are both associated with increasing age, and each increases the risk of development of the other.

  13. Increased risk of cognitive impairment in patients with diabetes is associated with metformin

    ✓ Peer-reviewed alzhub usefulness score 52 out of 100. Diabetes care 2013-09-05 Drug development

    Metformin use was associated with impaired cognitive performance.

  14. The Multinutrient Fortasyn Connect Influences Gut Microbiota and Intestinal Function in Early Alzheimer's Disease

    ✓ Peer-reviewed alzhub usefulness score 50 out of 100. Aging and disease 2025-11-13 Disease mechanisms

    Nutritional supplementation is emerging as a promising strategy to support clinical management of early Alzheimer's disease (AD), partly through modulation of the intestinal microbiome via the microbiota-gut-brain axis.

  15. The Mediterranean Diet: A powerful defense against Alzheimer disease-A comprehensive review

    ✓ Peer-reviewed alzhub usefulness score 50 out of 100. Clinical nutrition ESPEN 2024-09-28 Prevention and risk

    Recent studies have explored the impact of lifestyle, particularly diet, on cognitive decline and Alzheimer's disease (AD) risk.

  16. Metabolic Network Analysis Reveals Altered Bile Acid Synthesis and Metabolism in Alzheimer's Disease

    ✓ Peer-reviewed alzhub usefulness score 50 out of 100. Cell reports. Medicine 2020-11-17 Disease mechanisms

    Increasing evidence suggests Alzheimer's disease (AD) pathophysiology is influenced by primary and secondary bile acids, the end product of cholesterol metabolism.

  17. The gut microbiota-derived metabolite trimethylamine N-oxide is elevated in Alzheimer's disease

    ✓ Peer-reviewed alzhub usefulness score 50 out of 100. Alzheimer's research & therapy 2018-12-22 Biomarkers

    These findings provide additional insight into gut microbial involvement in AD and add to the growing understanding of the gut-brain axis.

  18. Understanding nutrition, depression and mental illnesses

    ✓ Peer-reviewed alzhub usefulness score 50 out of 100. Indian Journal of Psychiatry 2008-01-01 Brain scans and imaging

    The most common mental disorders that are currently prevalent in numerous countries are depression, bipolar disorder, schizophrenia, and obsessive-compulsive disorder (OCD).[2] The dietary intake pattern of the general population in many Asian and American countries reflects that they are often deficient in many nutrients, especially essential vitamins, minerals, and omega-3 fatty acids.[3] A notable feature of the diets of patients suffering from mental disorders is the severity of deficiency in these nutrients.[3] Studies have indicated that daily supplements of vital nutrients are often effective in reducing patients' symptoms.[4] Supplements containing amino acids have also been found to reduce symptoms, as they are converted to neurotransmitters which in turn alleviate depression and other mental health problems.[4] On the basis of accumulating scientific evidence, an effective therapeutic intervention is emerging, namely nutritional supplement/treatment.

  19. Palmitoylethanolamide and Luteolin in Brain Aging and Cognitive Decline: Biological Rationale and Current Evidence

    ✓ Peer-reviewed alzhub usefulness score 48 out of 100. Nutrients 2026-07-29 Clinical safety

    Cognitive decline is closely associated with biological aging and with interconnected processes, including chronic low-grade inflammation, oxidative stress, mitochondrial dysfunction, and cellular senescence.

  20. Pseudo-dementia caused by metformin-induced vitamin B12 deficiency

    ✓ Peer-reviewed alzhub usefulness score 48 out of 100. Psychiatria Danubina 2025-09 Drug development

    Metformin is the most widely used oral insulin-sensitizing agent.

  21. Emerging role of gut microbiota dysbiosis in neuroinflammation and neurodegeneration

    ✓ Peer-reviewed alzhub usefulness score 48 out of 100. Frontiers in neurology 2023-05-15 Disease mechanisms

    Alzheimer's disease (AD), is a chronic age-related progressive neurodegenerative disorder, characterized by neuroinflammation and extracellular aggregation of Aβ peptide.

  22. Diet's Role in Modifying Risk of Alzheimer's Disease: History and Present Understanding

    ✓ Peer-reviewed alzhub usefulness score 48 out of 100. Journal of Alzheimer's disease : JAD 2023 Prevention and risk

    Diet is an important nonpharmacological risk-modifying factor for Alzheimer's disease (AD).

  23. Dietary Components and Nutritional Strategies for Dementia Prevention in the Elderly

    ✓ Peer-reviewed alzhub usefulness score 48 out of 100. Current Alzheimer research 2023 Prevention and risk

    Polyphenols, folate, vitamin D, omega-3 fatty acids, and β-carotene might decrease the risk of dementia.

  24. Herbal Medicines for Diabetes Management and its Secondary Complications

    ✓ Peer-reviewed alzhub usefulness score 48 out of 100. Current diabetes reviews 2021-01-01 Risk factors

    These constituents have shown a reduction in blood glucose levels.

  25. Metabolic Syndrome, Alzheimer's Disease, and Covid 19: A Possible Correlation

    ✓ Peer-reviewed alzhub usefulness score 48 out of 100. Current Alzheimer research 2021 Risk factors

    Age and comorbidities are key indicators of hospital admission, serious illness, and mortality in COVID-19 patients.

From across this topic

10 of the 1,048 studies in this topic, 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 10. The same 10 appear here every time.

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