Primary sources grouped by topic. Every major claim on this site traces back to something here.
This page serves as the reference hub for NooKeto. Claims made throughout the site link back here. Sources are grouped by topic and presented with a brief summary of the finding. Where we are confident in the citation, a direct link is provided. Where verification is needed, it's marked.
Cunnane SC et al. — "Can Ketones Help Rescue Brain Fuel Supply in Later Life?" — Annals of the New York Academy of Sciences, 2016
Review demonstrating that ketones bypass the glucose hypometabolism seen in aging and Alzheimer's brains, providing an alternative fuel that maintains neuronal energy supply.
Kashiwaya Y et al. — "D-β-Hydroxybutyrate protects neurons in models of Alzheimer's and Parkinson's disease" — PNAS, 2000
Early landmark paper showing BHB's neuroprotective effects in cell models — reduced oxidative stress and improved mitochondrial efficiency.
Youm YH et al. — "The ketone metabolite β-hydroxybutyrate blocks NLRP3 inflammasome–mediated inflammatory disease" — Nature Medicine, 2015
Demonstrated that BHB inhibits NLRP3 inflammasome activation — a key driver of neuroinflammation — providing a mechanistic link between ketosis and reduced brain inflammation.
Shimazu T et al. — "Suppression of oxidative stress by β-hydroxybutyrate, an endogenous histone deacetylase inhibitor" — Science, 2013
BHB acts as an HDAC inhibitor, upregulating genes involved in oxidative stress resistance — FOXO3a and MT2. Provides epigenetic mechanism for ketone-mediated neuroprotection.
Yurko-Mauro K et al. — "Beneficial effects of docosahexaenoic acid on cognition in age-related cognitive decline" — Alzheimer's & Dementia, 2010
RCT showing 900mg DHA/day for 24 weeks improved learning and memory function in healthy older adults with age-related cognitive decline.
Zhang Y et al. — "Fish consumption and risk of dementia: a meta-analysis" — Psychiatry Research, 2022
Meta-analysis of cohort studies: fish consumption was associated with significantly lower risk of dementia. Dose-response relationship observed.
Dyall SC — "Long-chain omega-3 fatty acids and the brain: a review of the independent and shared effects of EPA, DPA and DHA" — Frontiers in Aging Neuroscience, 2015
Comprehensive review of how EPA, DPA and DHA each contribute to brain health — membrane fluidity, anti-inflammation, neurogenesis and neurotransmitter function.
Morris MC et al. — "MIND diet associated with reduced incidence of Alzheimer's disease" — Alzheimer's & Dementia, 2015
The landmark study: 923 participants, 4.5-year follow-up. Highest MIND diet adherence = 53% lower Alzheimer's rate vs lowest adherence. Even moderate adherence showed 35% reduction.
Morris MC et al. — "MIND diet slows cognitive decline with aging" — Alzheimer's & Dementia, 2015
Companion paper showing MIND diet adherence was associated with slower rate of cognitive decline equivalent to being 7.5 years younger.
Barnes LL et al. — "Trial of the MIND Diet for Prevention of Cognitive Decline in Older Persons" — NEJM, 2023
Randomised controlled trial (604 participants, 3 years). MIND diet group showed modest cognitive benefit over control diet, though the effect was smaller than observational studies predicted.
Krikorian R et al. — "Blueberry Supplementation Improves Memory in Older Adults" — Journal of Agricultural and Food Chemistry, 2010
12-week blueberry supplementation in older adults with early memory decline showed improved paired-associate learning and word list recall.
Lamport DJ et al. — "The effects of flavonoid and other polyphenol consumption on cognitive performance: a systematic review" — Nutrition, Healthy & Aging, 2012
Systematic review finding consistent acute benefits of flavonoid-rich foods on attention, processing speed and working memory in healthy adults. Chronic benefits less established but plausible.
Bowtell JL et al. — "Enhanced task-related brain activation and resting perfusion in healthy older adults after chronic blueberry supplementation" — Applied Physiology, Nutrition, and Metabolism, 2017
fMRI study showing 12 weeks of blueberry concentrate increased brain activation during cognitive tasks and improved resting cerebral blood flow in healthy older adults.
Grimmig B et al. — "Neuroprotective mechanisms of astaxanthin: a potential therapeutic role in preserving cognitive function in age and neurodegeneration" — GeroScience, 2017
Review of astaxanthin's ability to cross the blood-brain barrier and exert antioxidant, anti-inflammatory and anti-apoptotic effects in neural tissue. Outlines mechanisms for neuroprotection.
Katagiri M et al. — "Effects of astaxanthin-rich Haematococcus pluvialis extract on cognitive function" — Journal of Clinical Biochemistry and Nutrition, 2012
Small RCT (n=96) showing 12mg/day astaxanthin for 12 weeks improved composite memory score in healthy middle-aged and older adults. Small study, needs replication.
Annweiler C et al. — "Vitamin D and cognition in older adults: systematic review and meta-analysis" — Journal of Clinical Endocrinology & Metabolism, 2012
Meta-analysis finding that vitamin D deficiency is associated with worse cognitive performance and higher dementia risk. Supplementation benefit less clear in those already sufficient.
Marcinowska-Suchowierska E et al. — "Vitamin D Toxicity — A Clinical Perspective" — Frontiers in Endocrinology, 2018
Clinical review of vitamin D toxicity: hypercalcemia mechanisms, dose thresholds for toxicity, monitoring requirements. Critical reference for the safety warnings on the supplements page.
Holick MF — "Vitamin D deficiency" — New England Journal of Medicine, 2007
Seminal review defining vitamin D deficiency/insufficiency thresholds, health consequences, and supplementation guidelines. The foundation paper for modern vitamin D recommendations.
Zeisel SH — "Choline: critical role during fetal development and dietary requirements in adults" — Annual Review of Nutrition, 2006
Comprehensive review of choline's role in acetylcholine synthesis, cell membrane integrity, and methylation. Establishes that most adults don't meet adequate intake levels.
Poly C et al. — "The relation of dietary choline to cognitive performance and white-matter hyperintensity in the Framingham Offspring Cohort" — American Journal of Clinical Nutrition, 2011
Higher choline intake was associated with better cognitive performance (verbal memory, visual memory) in the Framingham cohort. Observational but large-scale and well-controlled.
A note on this page. All citations link directly to their primary source — PubMed, NEJM, ScienceDirect or ResearchGate. If you find a citation that appears incorrect or a link that has broken, please reach out via the About page.
Every content page on NooKeto links back here when making a claim. If a statement on another page seems bold, check here for the source. If it's not here, it should be clearly labelled as personal experimentation on the page where it appears.
This page will be updated as new research emerges or as existing citations are verified/corrected.
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