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| In Alzheimer's disease (AD), cholinergic dysfunction (often with reduced acetylcholine tone and impaired choline metabolism) is linked with cortical dysfunction, memory deficit, abnormal cerebral blood flow, task learning difficulty, sleep-cycle disruption, and neurodevelopmental effects (context-dependent). CORE HALLMARKS / HIGH-CONFIDENCE AXES: - tau and Aβ, their accumulation in AD brains is known to be a major hallmark. In AD, PP2A↓ activity is decreased (reported), contributing to hyperphosphorylated tau accumulation. SIRT-1↓ levels in AD brains are associated with accumulation of Aβ and tau (reported). - glucose metabolism↓ (brain glucose hypometabolism) occurs in AD long before significant clinical signs in many cohorts/models (reported). - Neuroinflammation / lipid mediator tone (reported): 5-LOX↑ and PGE2↑ (model-/region-dependent). - Synaptic vulnerability (reported): PSD95↓ in hippocampus and cortex; restoring PSD95 shows cognitive benefits in models. - Clearance/transport imbalance (reported): IDE↓, NEP↓, LRP1↓, and AEP↑ protein levels in AD brains (reported). COMMONLY REPORTED DIRECTIONAL CHANGES (model/region/compartment dependent): - Monoamines (reported): concentrations of 5-HTP↓, 5-HT(seratonin)↓, and 5-HIAA↓ are lower in Alzheimer's patients (varies by region/study). - Cholinergic system (clinical target): reduction in ACh↓ production; ChAT↓ activity reduced (synthesizes ACh). - Four key enzymes frequently targeted in AD symptom/adjunct strategies: AChE, BChE, MAOA, MAOB (objective inhibit). - Neurotrophic tone (reported): BDNF↓ in key regions. - Stress can decrease expression of brain-derived neurotrophic factor (BDNF). - Kinase/protease stress (reported): CDK5↑ hyperactivation; calpain↑ overactivated by increased intracellular Ca²⁺ → p-tau and aggregation. - Aβ-linked synaptic regulator (reported): STEP↑ upregulated largely due to Aβ oligomer accumulation. - α-secretase axis (reported): ADAM10↓ downregulated in AD brains. - Metabolic cofactors (reported): ALC↓ (ALCAR); Homocarnosine↓ (CSF declines with age); possible low Taurine↓ (age-related + dementia reports). - Ion/glutamate handling (reported): impaired glutamate clearance + depressed Na+/K+ ATPase → cellular ion imbalance risk. - Aging reduces NAD⁺↓ (in AD depletion may be more severe). - Mitochondrial capacity axis (reported): PGC-1↓ decreased in Alzheimer’s brains. - Innate immune DNA-sensing axis (animal): cGAS–STING↑ elevation observed in AD mice and normalized by NR treatment. - Vascular/structure (reported): a profound change in BBB permeability; progressive brain shrinkage (atrophy). - Glycation axis (reported): AGEs↑ and RAGE↑ expression. - cerebrospinal fluid (CSF) TMAO is higher in individuals with MCI and AD dementia compared to cognitively-unimpaired individuals. (gut microbes enzymatically generate trimethylamine (TMA) from choline or l-carnitine). - AD models and human tissue studies show an imbalance toward mitochondrial fission, involving increased DRP1 and FIS1 and reduced fusion proteins such as MFN1, MFN2, and OPA1. Usually increased or overactive in AD-like pathology -↓ Reduced miR-106b-5p has been reported in peripheral blood from Alzheimer's disease patients and has been investigated as a potential circulating biomarker. -Glutaminyl cyclase (QC/QPCT)↑ : because it can increase formation of pyroglutamate Aβ -GFAP↑ : Elevated GFAP is observed in affected brain regions and increased circulating GFAP is strongly associated with cerebral amyloid pathology and progression toward cognitive impairment. -ODC1↑ : Experimental inhibition of astrocytic ODC1 reduces aberrant GABA production, improves memory deficits, and can markedly reduce hippocampal Aβ plaque burden in APP/PS1 models. -H₂S signaling in Alzheimer’s disease: Generally ↓. AD is associated with reduced brain H₂S production, ↓ CSE/CTH expression, and particularly ↓ protein persulfidation. Reduced GSK3β persulfidation increases GSK3β activity and favors Tau hyperphosphorylation. -↓ Reduced synaptophysin is a well-established marker of presynaptic and synaptic loss in Alzheimer's disease. -↑ Increased 3-nitrotyrosine(3-NT) and protein tyrosine nitration are well-established indicators of oxidative and nitrosative stress in Alzheimer's disease. -↑ Increased peroxynitrite formation (ONOO) and nitrosative stress are associated with Alzheimer's disease. - salivary lactoferrin tends to be decreased in AD in several studies HOMOCYSTEINE / B-VITAMIN AXIS: - Raised plasma total homocysteine (tHcy)↑ associated with cognitive impairment, AD, or vascular dementia (epidemiology). - Homocysteine can build up if vitamin B6, B12, or folate levels are low. - Homocysteine and B-vitamin in Cognitive Impairment (VITACOG) study. - Vit B6 might be an important B vitamin (often discussed along with B12 and folate). - Thiamine↓ deficiency produces a cholinergic deficit (well-aligned with AD features). - Decreased thiamine (B1) in AD may exacerbate Aβ deposition, tau hyperphosphorylation, and oxidative stress (reported). -↓ SYN3 expression has been reported in hippocampal CA1 pyramidal neurons in mild cognitive impairment and Alzheimer's disease MICRONUTRIENTS / CAROTENOIDS (reported; compartment-dependent): - vitamin A↓ and β-carotene↓ lower in some AD cohorts; excess retinol may contribute to osteoporosis risk. - Diminished circulating vitamin E↓ reported in AD. - Vitamin B5↓ in multiple brain regions (reported). - Trace elements: patients with AD reported lower serum Se, Cu, and Zn↓ (serum findings vary by study). - Brain metals: some studies report higher brain copper↑ and iron↑ in specific regions/structures; compartment and region matter. Rosmarinic acid reported to reduce copper-induced neurotoxicity in vitro/in vivo and may interfere with amyloid–copper interactions (preclinical). - SAMe↓ concentrations in CSF reported in AD. - MPOD often reduced in AD patients. - AD brains reported lower levels of lutein↓, zeaxanthin↓, anhydrolutein↓, (VitA)retinol↓, lycopene↓, alpha-tocopherol↓. RISK CONTEXT: - Apolipoprotein E4 (ApoE4) genotype is the strongest known genetic risk factor for late-onset AD. - One copy of ApoE4: ~3–4× increased risk (range varies by cohort). - Two copies: ~8–12× increased risk (range varies). - VitK lower in circulating blood of APOE4 carriers (reported). - Type 2 diabetes, traumatic brain injury, stroke, diet, and above all, aging is the number ONE risk factor. Treatments / Strategy Targets (high-level): - Early intervention tends to have a greater positive effect than interventions during middle or late stages. - BOLD fMRI imaging can be used to observe brain activity via blood oxygen/flow changes. - Reduce ROS and inflammation in the brain (context-dependent; avoid over-suppressing adaptive signaling). - Inhibiting acetylcholinesterase (AChE) (which breaks down ACh), e.g., donepezil, rivastigmine. - Natural AChE inhibitors include: Berberine, Luteolin, Crocetin(saffron), Querctin, TQ - Natural AChE inhibitors in database (check BBB pass potential). - MAOB inhibitors, APP inhibitors, PGE2 inhibitors, NLRP3 inhibitors, BACE inhibitors - BDNF activators, PSD95 activator - STEP, ADAM10 - Diets with an adequate ratio (5:1) of omega-6:3 (Mediterranean diet). - Vitamins B1, B6, B12, B9 (folic acid) and D, choline, iron and iodine exert neuroprotective effects (general nutrition framing). - Antioxidants (vitamins C, E, A, zinc, selenium, lutein and zeaxanthin). - Fiber may promote gut microbiome diversity influencing brain health. - Supplementing with NAD⁺ precursors (NR or NMN) improves cognition and reduces amyloid/tau pathologies in AD mice (animal evidence). - "It is advisable to consume diets with an adequate ratio (5:1) of omega-6:3 fatty acids (Mediterranean diet) ... antioxidants ... role in oxidative stress ... cognition." Nutrition Strategies - Reduction of cognitive decline may be achieved by following a healthy dietary pattern limiting added sugars while maximizing fish, fruits, vegetables, nuts, seeds. SeNPs may also be useful as a Drug Delivery System. Related Pathways to research in this database (products that modulate them): - neuroprotective, cognitive, memory - Aβ aggregation, Tau↓, AChE↓, ACh↑, ChAT↑, acetyl-CoA↑, BDNF↑, BACE↓, NLRP3↓, PSD95↑, PGE2↓, homoC↓ - Increasing AntiOxidants: Catalase↑, GSH↑, SOD↑, HO-1↑, to decrease ROS↓ - Lower Inflammation: TNF-α↓, IL1β↓, IL6↓ Natural Products that may benefit AD. -Some key pathways are highlighted in RED in the following links Acetyl-L-carnitine, ALA, Apigenin, Anthocyanins Blueberrys, Aromatherapy, Artemisinin, Ashwagandha, β-carotene(vitamin A), Bacopa monnieri, Baicalein, Baicalin, Berberine, Betulinic acid, Boron, Boswellia (frankincense), Caffeic acid, Caffeine, Capsaicin, Carnosine, Carnosic acid, Chlorogenic acid, Choline (note U shaped dose curve-target 350mg/day), Chrysin, Cinnamon, CoQ10, Crocetin, Curcumin, dietMed, dietMet, dietSTF, EGCG, Ellagic acid, Exercise, Ferulic Acid, Fisetin, Flav, FLS, Folic Acid (5-MTHF, L-methylfolate)-reduce homocysteine, Galantamine, Ginger, Ginkgo biloba, Ginseng, Honokiol, Huperzine A, hydrogen gas, Lactoferrin, Lecithin, Licochalcone A, Lutein, Luteolin, Lycopene, M-Blu, Moringa oleifera, Mushroom Lion’s Mane, MSM, MCToil, NAD, Naringenin, PEMF, Piperine, Phenylbutyrate, Phosphatidylserine, Piperlongumine, Potassium, probiotics, Propolis, Pterostilbene, Quercetin, Resveratrol, Rivastigmine, Rosmaric Acid(reduce copper-induced neurotoxicity), Rutin, Safflower yellow, Sage, SAMe, selenium, Serotonin, Shankhpushpi, Shikonin, Shilajit/Fulvic Acid, silicon(reduce Alum bioavialability), Silymarin (Milk Thistle) silibinin, Sulforaphane, Taurine, TQ, Ursolic Acid Vitamin B1, Vitamin B2, Vitamin B3, Vitamin B5, Vitamin B6, Vitamin B12, Vitamin E, Vitamin D, Vitamin K2 Zeaxanthin, zinc, Aluminium has a negative impact on cognition but silicon can decrease Alumunium bioavailability, and Vitamin K2 may provide some protection. Example So does RMF Brain Energy Systems Matrix (AD)Tier 1–2 as “core metabolic cofactors / redox pools”Tier 4 as “alternative fuels / bypass strategies” Tier 5–6 as “capacity + delivery constraints” (often explains why supplements don’t translate)
TSF (Time-Scale Flag): P = 0–30 min, R = 30 min–3 hr, G = >3 hr (adaptation/phenotype). Evidence: "Strong (human)" = consistent clinical/epidemiologic support; "Moderate" = mixed but plausible human signals; "Emerging" = early-stage human; "Mechanistic" = preclinical/biochemical rationale. |
| 5296- | 5-HTP, | Serotonergic Regulation in Alzheimer’s Disease |
| - | Review, | AD, | NA |
| 3941- | 5HT, | dietMed, | VitB12, | FA, | VitC | Nutrition strategies that improve cognitive function |
| - | Review, | AD, | NA |
| 3972- | ACNs, | Recent Research on the Health Benefits of Blueberries and Their Anthocyanins |
| - | Review, | AD, | NA | - | Review, | Park, | NA |
| 2660- | AL, | Allicin: A review of its important pharmacological activities |
| - | Review, | AD, | NA | - | Review, | Var, | NA | - | Review, | Park, | NA | - | Review, | Stroke, | NA |
| 3548- | ALA, | How Alpha Linolenic Acid May Sustain Blood–Brain Barrier Integrity and Boost Brain Resilience against Alzheimer’s Disease |
| - | Review, | AD, | NA |
| 4135- | Alum, | Aluminum Should Now Be Considered a Primary Etiological Factor in Alzheimer's Disease |
| - | Review, | AD, | NA |
| 3822- | Aroma, | Aromatherapy in the treatment of Alzheimer's disease: A systematic review |
| - | Review, | AD, | NA |
| 3694- | BM, | Use of Bacopa monnieri in the Treatment of Dementia Due to Alzheimer Disease: Systematic Review of Randomized Controlled Trials |
| - | Review, | AD, | NA |
| 5925- | CAR, | Neuroprotective effects of carvacrol against Alzheimer’s disease and other neurodegenerative diseases: A review |
| - | Review, | AD, | NA | - | Review, | Park, | NA | - | Review, | Stroke, | NA |
| 3880- | Carno, | EFFECT OF ANSERINE/CARNOSINE SUPPLEMENTATION ON THE PREVENTION OF ALZHEIMER'S DISEASE IN PATIENTS WITH MILD COGNITIVE IMPAIRMENT |
| - | Trial, | AD, | NA |
| 5943- | Cela, | Celastrol: A Spectrum of Treatment Opportunities in Chronic Diseases |
| - | Review, | Arthritis, | NA | - | Review, | IBD, | NA | - | Review, | AD, | NA | - | Review, | Park, | NA |
| 3994- | CoQ10, | Se, | Coenzyme Q10 Supplementation in Aging and Disease |
| - | Review, | AD, | NA | - | Review, | Park, | NA |
| 3627- | Cro, | The effects of Crocus sativus (saffron) and its constituents on nervous system: A review |
| - | Review, | AD, | NA | - | Review, | Stroke, | NA |
| 2818- | CUR, | Novel Insight to Neuroprotective Potential of Curcumin: A Mechanistic Review of Possible Involvement of Mitochondrial Biogenesis and PI3/Akt/ GSK3 or PI3/Akt/CREB/BDNF Signaling Pathways |
| - | Review, | AD, | NA |
| 6288- | DL, | From Citrus to Clinic: Limonene’s Journey Through Preclinical Research, Clinical Trials, and Formulation Innovations |
| - | Review, | Var, | NA | - | Review, | AD, | NA |
| 7231- | EGb 761, | Efficacy and tolerability of Ginkgo biloba extract EGb 761® in dementia: a systematic review and meta-analysis of randomized placebo-controlled trials |
| - | Review, | AD, | NA |
| 6378- | Eug, | Effects of Eugenol on the Central Nervous System: Its Possible Application to Treatment of Alzheimer's Disease, Depression, and Parkinson's Disease |
| - | Review, | AD, | NA |
| 6377- | Eug, | Pharmacological Properties and Health Benefits of Eugenol: A Comprehensive Review |
| - | Review, | Var, | NA | - | Review, | AD, | NA |
| 4138- | Ex, | Relationship Between Exercise and Alzheimer’s Disease: A Narrative Literature Review |
| - | Review, | AD, | NA |
| 4141- | Ex, | Effects of exercise on brain-derived neurotrophic factor in Alzheimer's disease models: A systematic review and meta-analysis |
| - | Review, | AD, | NA |
| 4069- | FA, | Folate, folic acid and 5-methyltetrahydrofolate are not the same thing |
| - | Review, | AD, | NA |
| 4108- | FLS, | Improvement of olfactory function in AD mice mediated by immune responses under 40 Hz light flickering |
| - | in-vivo, | AD, | NA |
| 6931- | FLS, | Gamma frequency sensory stimulation in mild probable Alzheimer's dementia patients: Results of feasibility and pilot studies |
| - | Trial, | AD, | NA |
| 7081- | GABA, | Exploring the Therapeutic Potential of Gamma-Aminobutyric Acid in Stress and Depressive Disorders through the Gut–Brain Axis |
| - | Review, | AD, | NA |
| 4002- | Gins, | Improvement of cognitive deficit in Alzheimer's disease patients by long term treatment with korean red ginseng |
| - | Trial, | AD, | NA |
| 7482- | H2, | Molecular Hydrogen Therapy: Mechanisms, Delivery Methods, Preventive, and Therapeutic Application |
| - | Review, | Var, | NA | - | Review, | IBD, | NA | - | Review, | Stroke, | NA | - | Review, | Sepsis, | NA | - | Review, | AD, | NA |
| - | in-vitro, | AD, | HT22 |
| 4012- | K+, | Abnormal potassium-channel function in platelets in Alzheimer's disease |
| - | in-vivo, | AD, | NA |
| 4009- | K+, | Na+ and K+ ion imbalances in Alzheimer’s disease |
| - | Human, | AD, | NA |
| 3979- | Lut, | Increases in Plasma Lutein through Supplementation Are Correlated with Increases in Physical Activity and Reductions in Sedentary Time in Older Adults |
| - | Trial, | AD, | NA |
| 3981- | Lut, | Zeax, | VitE, | Omega-3 fatty acid, carotenoid and vitamin E supplementation improves working memory in older adults: A randomised clinical trial |
| - | Trial, | AD, | NA |
| 3983- | Lut, | Zeax, | The impact of supplemental macular carotenoids in Alzheimer's disease: a randomized clinical trial |
| - | Trial, | AD, | NA |
| 3905- | MCT, | Medium Chain Triglycerides induce mild ketosis and may improve cognition in Alzheimer's disease. A systematic review and meta-analysis of human studies |
| - | Review, | AD, | NA |
| 1778- | MEL, | Melatonin: a well-documented antioxidant with conditional pro-oxidant actions |
| - | Review, | Var, | NA | - | Review, | AD, | NA |
| 3595- | PI, | Black pepper and health claims: a comprehensive treatise |
| - | Review, | Var, | NA | - | Review, | AD, | NA |
| 4220- | PI, | Piperine ameliorated memory impairment and myelin damage in lysolecethin induced hippocampal demyelination |
| - | in-vivo, | AD, | NA | - | in-vivo, | MS, | NA |
| 3917- | PS, | Phosphatidylserine, inflammation, and central nervous system diseases |
| - | Review, | AD, | NA | - | Review, | Park, | NA | - | Review, | Stroke, | NA |
| - | Human, | AD, | NA |
| 3612- | RES, | Resveratrol in Alzheimer's disease: a review of pathophysiology and therapeutic potential |
| - | Review, | AD, | NA |
| 3099- | RES, | Resveratrol and cognitive decline: a clinician perspective |
| - | Review, | Nor, | NA | - | NA, | AD, | NA |
| 3938- | SAMe, | S-adenosyl-L-methionine in the treatment of Alzheimer's disease |
| - | Human, | AD, | NA |
| 4114- | SAMe, | S-Adenosylmethionine (SAMe) for Neuropsychiatric Disorders: A Clinician-Oriented Review of Research |
| - | Review, | AD, | NA |
| 6064- | SeNPs, | Multifunctional selenium-doped carbon dots for modulating Alzheimer's disease related toxic ions, inhibiting amyloid aggregation and scavenging reactive oxygen species |
| - | NA, | AD, | NA |
| 3963- | Taur, | Past Taurine Intake Has a Positive Effect on Present Cognitive Function in the Elderly |
| - | Human, | AD, | NA |
| 3962- | Taur, | The Development of Taurine Supplementary Menus for the Prevention of Dementia and Their Positive Effect on the Cognitive Function in the Elderly with Dementia |
| - | Human, | AD, | NA |
| 3961- | Taur, | Effects of Dietary Taurine Supplementation on Blood and Urine Taurine Concentrations in the Elderly Women with Dementia |
| - | Human, | AD, | NA |
| 3960- | Taur, | Versatile Triad Alliance: Bile Acid, Taurine and Microbiota |
| - | Review, | AD, | NA | - | Review, | Stroke, | NA |
| 3959- | Taur, | Taurine Directly Binds to Oligomeric Amyloid-β and Recovers Cognitive Deficits in Alzheimer Model Mice |
| - | in-vivo, | AD, | NA |
| 3952- | Taur, | Taurine and Astrocytes: A Homeostatic and Neuroprotective Relationship |
| - | Review, | AD, | NA | - | Review, | Stroke, | NA |
| 5904- | TV, | Pharmacological Properties and Molecular Mechanisms of Thymol: Prospects for Its Therapeutic Potential and Pharmaceutical Development |
| - | Review, | Var, | NA | - | Review, | Stroke, | NA | - | Review, | Diabetic, | NA | - | Review, | Obesity, | NA | - | Review, | AD, | NA | - | Review, | Arthritis, | NA |
Query results interpretion may depend on "conditions" listed in the research papers.
Such Conditions may include :
-low or high Dose
-format for product, such as nano of lipid formations
-different cell line effects
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-if effect was for normal or cancerous cells
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