Great report! Yes, Alzheimer's is a multifactorial disease involving age, genetics, vascular health, inflammation, lifestyle, and some pollutants.
In a systematic review and meta-analysis (2025), 54 studies on aluminum exposure and dementia/Alzheimer's risk were analyzed. The authors found that aluminum could contribute as one of several risk factors, not as the sole cause.
The greatest concern is focused on high and prolonged exposures, for example, from heavily polluted water and certain industrial environments, and intense occupational exposure. The evidence is much weaker for the usual amounts found in food or cooking utensils.
If we want to further minimize aluminum exposure, the measures with the best benefit-to-effort ratio would be: using stainless steel or glass containers for cooking and storing acidic foods, avoiding prolonged cooking of highly acidic foods (tomatoes, lemons, vinegar) in unlined aluminum containers, and drinking good quality water. Overall, the 2025 research reinforces the idea that aluminum is a possible environmental risk factor, but it does not change the scientific consensus:
Alzheimer's disease has a significant environmental component for cognitive decline and Alzheimer's disease, ahead of aluminum.
1) Air pollution (PM2.5) is the environmental factor with the strongest evidence because ultrafine particles can reach the brain and promote inflammation, oxidative stress, and vascular damage with chronic exposure.
2) Pesticides, especially occupational exposure or exposure over many years, are associated with a higher risk of Alzheimer's and also Parkinson's disease.
3) Heavy metals, where lead shows fairly consistent evidence, especially if exposure occurred decades ago, followed by cadmium with moderate evidence, and mercury with inconsistent results.
4) PFAS, bisphenols, and phthalates constitute a very active area of research.
Research from 2024–2026 establishes that vascular health not only influences Alzheimer's disease but likely plays a central role in its development. Many experts believe that Alzheimer's and cerebrovascular disease often coexist and reinforce each other.
Recent findings indicate that hypertension is the most important modifiable vascular risk factor, along with diabetes and insulin resistance, smoking and alcohol consumption, and elevated cholesterol (ApoB). Conversely, physical activity improves blood vessel function, increases cerebral blood flow, and is one of the most scientifically supported preventive interventions.
Genetics is one of the most important risk factors for Alzheimer's disease, but in most cases, it does not determine a person's fate. The disease usually arises from the interaction between genes, age, and other factors. Since 2025–2026, more than 80 genes have been identified that contribute to the risk, each with a small effect. Many are involved in brain inflammation, cholesterol metabolism, microglia function, and the clearance of beta-amyloid and tau proteins.
While APOE ε2, one copy of APOE ε4 approximately doubles or triples the risk, and two copies (ε4/ε4) multiply the risk much more, although this does not mean that the person will definitely develop Alzheimer's.
Hereditary Alzheimer's is very rare, but mutations in APP, PSEN1, and PSEN2 can cause early-onset Alzheimer's (before age 60–65), but they represent less than 1% of all cases. https://cru.mcgill.ca/apoe-alzheimers/ (2025)
The most recent scientific evidence is very consistent: lifestyle is the main modifiable factor for reducing the risk of Alzheimer's. It cannot eliminate the risk completely, but it can delay the onset or decrease the likelihood of developing the disease.
The factors with the strongest scientific support:
1) Physical exercise, which is the intervention with the most evidence, improving cerebral blood flow, reducing inflammation, and promoting neuronal plasticity.
2) A healthy diet based on vegetables, fruits, nuts, olive oil, whole grains, and few processed foods.
3) Cognitive and social stimulation, such as reading, learning new skills, conversing, playing an instrument, or participating in social activities, helps increase what is known as "cognitive reserve." An intellectually active life can delay the onset of symptoms by several years.
4) Sleeping 7–8 hours and treating disorders such as sleep apnea can promote the elimination of proteins like beta-amyloid during sleep.
The U.S. clinical trial POINTER, published in JAMA in 2025, demonstrated that a structured program combining these factors produced a measurable improvement in cognitive function in older adults at risk of decline, reinforcing the idea that acting on several habits simultaneously is more effective than focusing on just one.
Studies published in 2025 and 2026 are quite encouraging, although it's important to clarify that there is no evidence that a vegan diet, on its own, prevents Alzheimer's. What does seem important is the quality of the plant-based diet.
The main findings are:
A diet high in whole fruits and vegetables reduces the risk. A large study published in Neurology (2026) found that people who followed a diet rich in vegetables, fruits, whole grains, nuts, legumes, coffee, and tea had a lower risk of developing Alzheimer's and other dementias. Furthermore, improving diet quality over time was also associated with a lower risk
The proposed mechanisms include reduced systemic inflammation, improved vascular health, reduced oxidative stress, improved insulin sensitivity, and increased intake of polyphenols and fiber, which also promote a healthy gut microbiota.
I had a house by the sea for a short time and sleep was amazing in the quiet. There was a gentle lapping of the 6” waves. There was no electricity. I just took the battery out of my car to hook to a light while I cooked with my baby boy. I caught rain water clean enough to drink in a blue barrel. I couldn’t run the light for long because I couldn’t risk not being able to start the car in the morning from wearing the battery down. My five year d had to get to school each day. It was the healthiest I ever felt. There was indescribable calm in my soul each morning. People are so common to think that style of living is subnormal. They thought I had a problem. I think they have a problem
Refreshing to have strong research to give us regenerative pathways to create and maintain health. The behavior to focus on symptoms and ignore actual causes seems to be the lifeblood across so many Industries appearing to have carefully crafted to keep a focus on what just the one or few things they want us to focus on.
This created not just a one lane layer of society, the Rockefeller Monopoly Medical Machine with it's own Money Machine Juggernaut,, but many others who also feed into the Governments of Businesses - Financial Institutions, Oil, Energy, Ag, Chemicals, Ultra Processed Foods, Media, Education, all with a similar money machine supporting not just their selves; But to cross over to weave in and out of one another so they all add into support each other. But, until recent history, not realized or seen by John Q. Public.
This is being seen now with Legacy Media is reporting nothing to see here, move on, Safe and Effective, Saved Millions PR messaging fueled by lots of $$$$$ of the Medical Machine's deep pockets. Also supported by the Trillions in the deep pockets of all those others mentioned.
To have movement to the regenerative paths would have been unheard of just a few years ago. The negatives resulting from Reality have become to big to not see. The Deep Pockets filled with Trillions have little to any choice then to keep doubling, tripling down to attempt to hang on to the same old, same old.
With the recent testimony resulting in 111, I take the fifth suggests the machine is attempting to plead at some point, Alzheimer's. Just Say'n'
Outstanding links Gui, chapter and verse on what I usually call High Jacking. When we discover just how negative something is and positive, meaningful understanding leading to positive meaningful new directions upset the Ca$h Cow$ paradigm/s, the new information spreads by word of mouth.
Positive results win converts. This is when the expression first they ignore you, then they laugh at you, then they fight you and finally when you win, they claim, everyone always knew this all along...but only when the Power Structure loses the battle. Your links show when they win, why. They infiltrate, overwhelm with super saturating and confusing the message because after the first few waves of gaining ground, most who come after have basic ideas of what changes may be. Don't know expanded understanding, details. Often, oh, I've heard about this, I'll talk to So and So, they are into this. This is where the Power Machine with a stranglehold on an ability to pump out mass PR (mis - dis - mal,) information clouds, takes over and inserts counter measures and wah lah, we end up with much of the same old, same old. The smaller, honest and real efforts are buried and burdened with rules and regulations they don't need, the monopolies need them to prevent anyone building better mousetraps. So then at best, reformers have to reinvent the wheel, to often having to start from square one.
And you're absolutely right, Just. We know it's normal for memory to weaken a little with age. As you point out, stress, bad memories, and the reality of a decadent humanity plagued by wars and corruption affect us negatively. In Spain, it's blueberry and cherry season, and my wife and I are taking advantage of these organic delicacies from the Picos de Europa (northern Spain), which are excellent for gut and brain health, as the second study reports.
The important thing is that we take care of our health with healthy habits to avoid neurodegenerative diseases. Research shows that the gut microbiota of people with cognitive disorders differs from that of neurologically healthy older populations. Cognitive functions tend to decline with age, particularly memory. Episodic, working, and recognition memory are the most susceptible to age-related decline. One of the most common age-related cognitive impairments is dementia, and Alzheimer's disease (AD) is the most severe type of dementia.
Studies investigating the gut microbiota in individuals with Alzheimer's disease (AD) have consistently reported a greater abundance of pro-inflammatory phyla and a decrease in anti-inflammatory phyla compared to age-matched control groups. A notable decrease in the Firmicutes phylum, an increase in the pro-inflammatory Bacteroidetes phylum, and a decrease in the Actinobacteria phylum were observed. This shift in the latter phyla was primarily driven by a significant reduction in the genus Bifidobacterium among AD participants in the United States, a genus known for its anti-inflammatory properties. Furthermore, a study of AD patients and participants with dementia elsewhere found that these individuals exhibited reduced diversity in their gut microbiota compared to normal aging control groups.
It has been reported that 10% of adults aged 70 and older were diagnosed with dementia in 2019. This gap is significant, especially considering the incurable nature of Alzheimer's disease. There is a notable lack of emphasis on healthy aging in the context of the gut microbiota and cognitive function.
Specific species of gut bacteria are linked to improved cognitive function. For example, the abundance of bacteria from the phylum Verrucomicrobia was found to be positively associated with verbal memory, visual scanning, working memory, and cognitive flexibility, while the phylum Firmicutes was associated with, among other things, improved immediate and delayed recall. Specific families within Firmicutes, such as Gemellaceae and Clostridiaceae, were associated with improved concentration, memory speed, attention, and working memory quality. The Ruminococcus gauvreauii and Carnobacteriaceae groups within this phylum also showed positive correlations with certain cognitive functions, while Lachnospiraceae had an inverse association with cognition, such as spatial working memory. It appears that the Firmicutes/Bacteroidetes ratio (F/B, or Bacillota-to-Bacteroidota, according to more recent nomenclature) is another important factor in predicting cognitive function. The F/B ratio is often studied in the context of human health, particularly in relation to obesity and other metabolic conditions, but it also seems to be connected to cognitive health. In general, any deviation from the F/B ratio is considered dysbiosis and detrimental to the host. The F/B ratio is recognized as an important index of gut microbiota health and is also influenced by the amount of physical exercise, so it is not surprising that it can also influence the host's cognitive state. We should consider that diets rich in fiber, polyphenols, and compounds with anti-inflammatory or antioxidant properties promote microbiome diversity and health. The components analyzed in a review, including berries, fermented papaya, hop flavonoids, and antioxidant vitamins, exhibit a combination of similar and diverse effects on cognitive functions. cognitive. Many of these interventions share common pathways, such as reducing oxidative stress, improving redox status, enhancing cerebral blood flow, strengthening gut-brain communication, supporting neuroprotection, and regulating mood through the production of short-chain fatty acids (SCFAs). Polyphenol-rich foods, such as berries, are particularly notable for their ability to improve memory, mood, and cognitive performance. These benefits are attributed to increased cerebral blood flow, improved endothelial function, and modulation of
Antioxidant vitamins, such as vitamins C, B2, and D, improve cognitive function through various mechanisms. For example, vitamin C has been shown to reduce oxidative stress in brain tissue, promote neurotransmitter synthesis, and improve mental clarity. Vitamin D influences cognitive outcomes by interacting with the vitamin D receptor (VDR), which regulates gene expression involved in brain function and neuroprotection. A combination of vitamins C and B2 has demonstrated synergistic effects, further improving mood and memory in clinical trials. Vitamin supplementation yielded more consistent results, with higher levels of beneficial bacteria such as Akkermansia and Faecalibacterium, and increased short-chain fatty acid (SCFA) production. Mechanistically, antioxidants support the production of SCFAs, such as butyrate, propionate, and acetate, which are key metabolites produced by the gut microbiota. SCFAs exert protective effects on the intestinal barrier by stimulating mucin production and the expression of tight junction proteins, such as occludin and claudin, thereby improving barrier integrity and reducing endotoxin translocation, which decreases systemic inflammation. In the context of the gut-brain axis, SCFAs modulate microglial activity in the brain, potentially reducing neuroinflammation and supporting neurogenesis in the hippocampus [9]. Antioxidants can also influence redox balance in the gut, promoting microbiome diversity and encouraging the growth of SCFA-producing bacteria, such as Faecalibacterium prausnitzii and Akkermansia muciniphila. In summary, antioxidant supplementation, including vitamins C, B2, and D, as well as polyphenols such as xanthohumol, fermented papaya, peanuts, and berry extracts, shows potential for improving cognitive function and gut health by modulating gut microbiome diversity and reducing inflammation. These antioxidants can support the gut-brain axis, primarily by increasing the production of short-chain fatty acids (SCFAs) and improving the integrity of the intestinal barrier, which helps mitigate oxidative stress, a factor often associated with cognitive decline and neurodegenerative diseases.
Great report! Yes, Alzheimer's is a multifactorial disease involving age, genetics, vascular health, inflammation, lifestyle, and some pollutants.
In a systematic review and meta-analysis (2025), 54 studies on aluminum exposure and dementia/Alzheimer's risk were analyzed. The authors found that aluminum could contribute as one of several risk factors, not as the sole cause.
The greatest concern is focused on high and prolonged exposures, for example, from heavily polluted water and certain industrial environments, and intense occupational exposure. The evidence is much weaker for the usual amounts found in food or cooking utensils.
If we want to further minimize aluminum exposure, the measures with the best benefit-to-effort ratio would be: using stainless steel or glass containers for cooking and storing acidic foods, avoiding prolonged cooking of highly acidic foods (tomatoes, lemons, vinegar) in unlined aluminum containers, and drinking good quality water. Overall, the 2025 research reinforces the idea that aluminum is a possible environmental risk factor, but it does not change the scientific consensus:
https://pubmed.ncbi.nlm.nih.gov/40749395/ (2025)
https://pubmed.ncbi.nlm.nih.gov/40749395/ (2025)
Alzheimer's disease has a significant environmental component for cognitive decline and Alzheimer's disease, ahead of aluminum.
1) Air pollution (PM2.5) is the environmental factor with the strongest evidence because ultrafine particles can reach the brain and promote inflammation, oxidative stress, and vascular damage with chronic exposure.
2) Pesticides, especially occupational exposure or exposure over many years, are associated with a higher risk of Alzheimer's and also Parkinson's disease.
3) Heavy metals, where lead shows fairly consistent evidence, especially if exposure occurred decades ago, followed by cadmium with moderate evidence, and mercury with inconsistent results.
4) PFAS, bisphenols, and phthalates constitute a very active area of research.
https://pmc.ncbi.nlm.nih.gov/articles/PMC11591912/ (2024)
https://oamonitor.ireland.openaire.eu/national/search/publication?pid=10.3390%2Fbiom14111366
(2024)
https://pmc.ncbi.nlm.nih.gov/articles/PMC12625418/ (2025)
Research from 2024–2026 establishes that vascular health not only influences Alzheimer's disease but likely plays a central role in its development. Many experts believe that Alzheimer's and cerebrovascular disease often coexist and reinforce each other.
Recent findings indicate that hypertension is the most important modifiable vascular risk factor, along with diabetes and insulin resistance, smoking and alcohol consumption, and elevated cholesterol (ApoB). Conversely, physical activity improves blood vessel function, increases cerebral blood flow, and is one of the most scientifically supported preventive interventions.
An important finding: a population-based study published in 2025 estimated that up to 44% of dementia cases before age 80 could be attributed to vascular risk factors. https://static1.squarespace.com/static/55171c10e4b07ea6d281b1f1/t/68693290bc5b400d2da089c3/1751724688476/Husain+Vascular+health+and+brain+health.pdf
(2024)
https://pubmed.ncbi.nlm.nih.gov/40000032/ (2025)
https://medicalxpress.com/news/2025-06-term-midlife-vascular-health-dementia.html (2025)
Genetics is one of the most important risk factors for Alzheimer's disease, but in most cases, it does not determine a person's fate. The disease usually arises from the interaction between genes, age, and other factors. Since 2025–2026, more than 80 genes have been identified that contribute to the risk, each with a small effect. Many are involved in brain inflammation, cholesterol metabolism, microglia function, and the clearance of beta-amyloid and tau proteins.
While APOE ε2, one copy of APOE ε4 approximately doubles or triples the risk, and two copies (ε4/ε4) multiply the risk much more, although this does not mean that the person will definitely develop Alzheimer's.
Hereditary Alzheimer's is very rare, but mutations in APP, PSEN1, and PSEN2 can cause early-onset Alzheimer's (before age 60–65), but they represent less than 1% of all cases. https://cru.mcgill.ca/apoe-alzheimers/ (2025)
https://www.mayoclinic.org/diseases-conditions/alzheimers-disease/in-depth/alzheimers-genes/art-20046552 (2025)
https://johnsonmemorial.org/jmh-health-information-articles/art-20046552 (2025)
The most recent scientific evidence is very consistent: lifestyle is the main modifiable factor for reducing the risk of Alzheimer's. It cannot eliminate the risk completely, but it can delay the onset or decrease the likelihood of developing the disease.
The factors with the strongest scientific support:
1) Physical exercise, which is the intervention with the most evidence, improving cerebral blood flow, reducing inflammation, and promoting neuronal plasticity.
2) A healthy diet based on vegetables, fruits, nuts, olive oil, whole grains, and few processed foods.
3) Cognitive and social stimulation, such as reading, learning new skills, conversing, playing an instrument, or participating in social activities, helps increase what is known as "cognitive reserve." An intellectually active life can delay the onset of symptoms by several years.
4) Sleeping 7–8 hours and treating disorders such as sleep apnea can promote the elimination of proteins like beta-amyloid during sleep.
The U.S. clinical trial POINTER, published in JAMA in 2025, demonstrated that a structured program combining these factors produced a measurable improvement in cognitive function in older adults at risk of decline, reinforcing the idea that acting on several habits simultaneously is more effective than focusing on just one.
https://pubmed.ncbi.nlm.nih.gov/40442885/ (2025)
https://www.researchgate.net/publication/403317323_Food_and_nutrition_in_the_prevention_of_dementia-A_mini-review (2026)
https://people.com/alzheimer-s-risk-cut-by-nearly-40-for-people-who-did-this-one-thing-11905449 (2026)
https://people.com/alzheimer-s-risk-cut-by-nearly-40-for-people-who-did-this-
(2026)
Studies published in 2025 and 2026 are quite encouraging, although it's important to clarify that there is no evidence that a vegan diet, on its own, prevents Alzheimer's. What does seem important is the quality of the plant-based diet.
The main findings are:
A diet high in whole fruits and vegetables reduces the risk. A large study published in Neurology (2026) found that people who followed a diet rich in vegetables, fruits, whole grains, nuts, legumes, coffee, and tea had a lower risk of developing Alzheimer's and other dementias. Furthermore, improving diet quality over time was also associated with a lower risk
The proposed mechanisms include reduced systemic inflammation, improved vascular health, reduced oxidative stress, improved insulin sensitivity, and increased intake of polyphenols and fiber, which also promote a healthy gut microbiota.
https://pubmed.ncbi.nlm.nih.gov/40077754/ (2025)
https://www.neurology.org/doi/10.1212/WNL.0000000000214916 (2026)
https://www.sciencedirect.com/science/article/pii/S227458072500398X (2026)
I had a house by the sea for a short time and sleep was amazing in the quiet. There was a gentle lapping of the 6” waves. There was no electricity. I just took the battery out of my car to hook to a light while I cooked with my baby boy. I caught rain water clean enough to drink in a blue barrel. I couldn’t run the light for long because I couldn’t risk not being able to start the car in the morning from wearing the battery down. My five year d had to get to school each day. It was the healthiest I ever felt. There was indescribable calm in my soul each morning. People are so common to think that style of living is subnormal. They thought I had a problem. I think they have a problem
Refreshing to have strong research to give us regenerative pathways to create and maintain health. The behavior to focus on symptoms and ignore actual causes seems to be the lifeblood across so many Industries appearing to have carefully crafted to keep a focus on what just the one or few things they want us to focus on.
This created not just a one lane layer of society, the Rockefeller Monopoly Medical Machine with it's own Money Machine Juggernaut,, but many others who also feed into the Governments of Businesses - Financial Institutions, Oil, Energy, Ag, Chemicals, Ultra Processed Foods, Media, Education, all with a similar money machine supporting not just their selves; But to cross over to weave in and out of one another so they all add into support each other. But, until recent history, not realized or seen by John Q. Public.
This is being seen now with Legacy Media is reporting nothing to see here, move on, Safe and Effective, Saved Millions PR messaging fueled by lots of $$$$$ of the Medical Machine's deep pockets. Also supported by the Trillions in the deep pockets of all those others mentioned.
To have movement to the regenerative paths would have been unheard of just a few years ago. The negatives resulting from Reality have become to big to not see. The Deep Pockets filled with Trillions have little to any choice then to keep doubling, tripling down to attempt to hang on to the same old, same old.
With the recent testimony resulting in 111, I take the fifth suggests the machine is attempting to plead at some point, Alzheimer's. Just Say'n'
a link addressing what has gone on behind the curtain.
https://realorganicproject.org/amy-westerveldt-think-tanks-greenwashing-war-on-reality/
https://www.youtube.com/watch?v=HtOtA3IeVZU
https://www.ucs.org/resources/disinformation-playbook
Outstanding links Gui, chapter and verse on what I usually call High Jacking. When we discover just how negative something is and positive, meaningful understanding leading to positive meaningful new directions upset the Ca$h Cow$ paradigm/s, the new information spreads by word of mouth.
Positive results win converts. This is when the expression first they ignore you, then they laugh at you, then they fight you and finally when you win, they claim, everyone always knew this all along...but only when the Power Structure loses the battle. Your links show when they win, why. They infiltrate, overwhelm with super saturating and confusing the message because after the first few waves of gaining ground, most who come after have basic ideas of what changes may be. Don't know expanded understanding, details. Often, oh, I've heard about this, I'll talk to So and So, they are into this. This is where the Power Machine with a stranglehold on an ability to pump out mass PR (mis - dis - mal,) information clouds, takes over and inserts counter measures and wah lah, we end up with much of the same old, same old. The smaller, honest and real efforts are buried and burdened with rules and regulations they don't need, the monopolies need them to prevent anyone building better mousetraps. So then at best, reformers have to reinvent the wheel, to often having to start from square one.
And you're absolutely right, Just. We know it's normal for memory to weaken a little with age. As you point out, stress, bad memories, and the reality of a decadent humanity plagued by wars and corruption affect us negatively. In Spain, it's blueberry and cherry season, and my wife and I are taking advantage of these organic delicacies from the Picos de Europa (northern Spain), which are excellent for gut and brain health, as the second study reports.
The important thing is that we take care of our health with healthy habits to avoid neurodegenerative diseases. Research shows that the gut microbiota of people with cognitive disorders differs from that of neurologically healthy older populations. Cognitive functions tend to decline with age, particularly memory. Episodic, working, and recognition memory are the most susceptible to age-related decline. One of the most common age-related cognitive impairments is dementia, and Alzheimer's disease (AD) is the most severe type of dementia.
Studies investigating the gut microbiota in individuals with Alzheimer's disease (AD) have consistently reported a greater abundance of pro-inflammatory phyla and a decrease in anti-inflammatory phyla compared to age-matched control groups. A notable decrease in the Firmicutes phylum, an increase in the pro-inflammatory Bacteroidetes phylum, and a decrease in the Actinobacteria phylum were observed. This shift in the latter phyla was primarily driven by a significant reduction in the genus Bifidobacterium among AD participants in the United States, a genus known for its anti-inflammatory properties. Furthermore, a study of AD patients and participants with dementia elsewhere found that these individuals exhibited reduced diversity in their gut microbiota compared to normal aging control groups.
It has been reported that 10% of adults aged 70 and older were diagnosed with dementia in 2019. This gap is significant, especially considering the incurable nature of Alzheimer's disease. There is a notable lack of emphasis on healthy aging in the context of the gut microbiota and cognitive function.
Specific species of gut bacteria are linked to improved cognitive function. For example, the abundance of bacteria from the phylum Verrucomicrobia was found to be positively associated with verbal memory, visual scanning, working memory, and cognitive flexibility, while the phylum Firmicutes was associated with, among other things, improved immediate and delayed recall. Specific families within Firmicutes, such as Gemellaceae and Clostridiaceae, were associated with improved concentration, memory speed, attention, and working memory quality. The Ruminococcus gauvreauii and Carnobacteriaceae groups within this phylum also showed positive correlations with certain cognitive functions, while Lachnospiraceae had an inverse association with cognition, such as spatial working memory. It appears that the Firmicutes/Bacteroidetes ratio (F/B, or Bacillota-to-Bacteroidota, according to more recent nomenclature) is another important factor in predicting cognitive function. The F/B ratio is often studied in the context of human health, particularly in relation to obesity and other metabolic conditions, but it also seems to be connected to cognitive health. In general, any deviation from the F/B ratio is considered dysbiosis and detrimental to the host. The F/B ratio is recognized as an important index of gut microbiota health and is also influenced by the amount of physical exercise, so it is not surprising that it can also influence the host's cognitive state. We should consider that diets rich in fiber, polyphenols, and compounds with anti-inflammatory or antioxidant properties promote microbiome diversity and health. The components analyzed in a review, including berries, fermented papaya, hop flavonoids, and antioxidant vitamins, exhibit a combination of similar and diverse effects on cognitive functions. cognitive. Many of these interventions share common pathways, such as reducing oxidative stress, improving redox status, enhancing cerebral blood flow, strengthening gut-brain communication, supporting neuroprotection, and regulating mood through the production of short-chain fatty acids (SCFAs). Polyphenol-rich foods, such as berries, are particularly notable for their ability to improve memory, mood, and cognitive performance. These benefits are attributed to increased cerebral blood flow, improved endothelial function, and modulation of
Antioxidant vitamins, such as vitamins C, B2, and D, improve cognitive function through various mechanisms. For example, vitamin C has been shown to reduce oxidative stress in brain tissue, promote neurotransmitter synthesis, and improve mental clarity. Vitamin D influences cognitive outcomes by interacting with the vitamin D receptor (VDR), which regulates gene expression involved in brain function and neuroprotection. A combination of vitamins C and B2 has demonstrated synergistic effects, further improving mood and memory in clinical trials. Vitamin supplementation yielded more consistent results, with higher levels of beneficial bacteria such as Akkermansia and Faecalibacterium, and increased short-chain fatty acid (SCFA) production. Mechanistically, antioxidants support the production of SCFAs, such as butyrate, propionate, and acetate, which are key metabolites produced by the gut microbiota. SCFAs exert protective effects on the intestinal barrier by stimulating mucin production and the expression of tight junction proteins, such as occludin and claudin, thereby improving barrier integrity and reducing endotoxin translocation, which decreases systemic inflammation. In the context of the gut-brain axis, SCFAs modulate microglial activity in the brain, potentially reducing neuroinflammation and supporting neurogenesis in the hippocampus [9]. Antioxidants can also influence redox balance in the gut, promoting microbiome diversity and encouraging the growth of SCFA-producing bacteria, such as Faecalibacterium prausnitzii and Akkermansia muciniphila. In summary, antioxidant supplementation, including vitamins C, B2, and D, as well as polyphenols such as xanthohumol, fermented papaya, peanuts, and berry extracts, shows potential for improving cognitive function and gut health by modulating gut microbiome diversity and reducing inflammation. These antioxidants can support the gut-brain axis, primarily by increasing the production of short-chain fatty acids (SCFAs) and improving the integrity of the intestinal barrier, which helps mitigate oxidative stress, a factor often associated with cognitive decline and neurodegenerative diseases.
The links contain very interesting tables.
https://www.mdpi.com/2072-6643/16/6/852 (2024).
https://pmc.ncbi.nlm.nih.gov/articles/PMC11764720/ (2025)
https://www.sciopen.com/article/10.7506/spkx1002-6630-20240818-130 (2025)
https://www.tandfonline.com/doi/abs/10.1080/1028415X.2025.2567429 (2026)
https://www.proquest.com/openview/cf8f24bbc18a354ac5c292c7549c9504/1?pq-origsite=gscholar&cbl=2040187 (2026)
https://pmc.ncbi.nlm.nih.gov/articles/PMC13015333/ (2026)
https://academic.oup.com/lambio/article-abstract/79/2/ovag010/8442267 (2026)
https://www.nakagaki.co.jp/mobile/bunken/bunken-chonai-75/Microbiota-gut-brain-axis-dysregulation-in-Alzheimer-s-d_2026_Brain--Behavio.pdf (2026)
https://pmc.ncbi.nlm.nih.gov/articles/PMC13024051/ (2026)
I was unable to find the list of DSMO long tried and true brand recommendations for this well explained article on Dementia .