How to Protect Your Brain from Alzheimer's: Natural Prevention Strategies That Work

Join Dr. James Odell for Season 2 of the Science of Self-Healing Podcast! He's the medical and executive director for BRMI, as well as a practicing naturopathic doctor for over 35 years, and he's here to share with you his extensive knowledge of medicine from a different perspective.

The Bioregulatory Medicine Institute

The Science of Self-Healing Podcast

What if everything we thought we knew about Alzheimer's disease was only half the story? For decades, scientists have focused on the same two culprits — and the treatments built around them have repeatedly fallen short. In this episode of The Science of Self-Healing, we explore a quietly revolutionary shift happening in brain research — one that changes not just how we understand Alzheimer's, but what we can actually do about it. We'll look at the hidden systems that govern brain health, the lifestyle and nutritional tools that can influence them, and some cutting-edge natural medicine findings that most people haven't heard about yet. The answer to protecting your brain may have far less to do with your genes than you think, and far more to do with what is happening inside your body right now. Tune in — your future self may thank you.

Hello, everyone, and welcome to the Science of Self-Healing podcast. For health and wellness knowledge from a different perspective. Produced by the Bioregulatory Medicine Institute, also known as BRMI. We are your source for unparalleled information about how you can naturally support your body's ability to regulate, adapt, regenerate, and self-heal. I'm your host, Dr. James Odell, the medical and executive director for BRMI, as well as a practicing naturopathic doctor for over 35 years. And remember, this podcast is for informational purposes only and is not intended to be a substitute for the direct care of a qualified health professional who oversees and provides unique and individual care. The information here is to broaden our different perspectives and should not be construed as medical advice or treatment. Let's get started.

Hello everyone, and welcome to another episode of The Science of Self-Healing. Today, we're discussing one of the most pressing health challenges of our time — Alzheimer's disease. We'll explore why the traditional view of this disease is incomplete, how the body's regulatory systems are at the heart of brain health, and what you can actually do — through lifestyle, nutrition, and supplementation — to protect your cognitive future. Whether you're concerned about your own brain health or that of someone you love, this episode is for you.

How Common Is Alzheimer's Disease?

It seems almost every day I encounter someone who has Alzheimer's disease or whose family member has Alzheimer's. It appears epidemic. Statistics tell us that an estimated 7.4 million Americans aged 65 and older are living with Alzheimer's in 2026, with about 1 in 9 seniors — that's 11% — having the disease. And that number is increasing.

Rethinking the Cause: Beyond Amyloid and Tau

At its core, Alzheimer's disease has long been defined by two pathological hallmarks that researchers consistently find in affected brains: amyloid-beta plaques and tau tangles. These abnormal protein accumulations are present in virtually every Alzheimer's patient — and for decades, they were assumed to be the primary cause of the disease. That assumption, however, is now one of the most actively contested questions in all of neuroscience. A striking 43 percent of cognitively healthy people in their eighties have been found to carry significant amyloid plaques with no signs of dementia whatsoever. And treatments specifically designed to clear amyloid from the brain have shown, at best, modest effects on cognitive decline. What this tells us is that amyloid and tau are reliable markers of something going wrong in the brain — but they may be more the fingerprints of a deeper dysfunction than the root cause of it. That distinction matters enormously, because it is exactly what has pushed researchers toward the broader, systems-level model we are going to discuss today.

A Systems-Level View of Alzheimer's

What has emerged is a more comprehensive model — one in which Alzheimer's is understood as a systems-level breakdown. In this model, amyloid and tau are not the sole drivers of disease, but rather indicators of deeper dysfunction across multiple regulatory systems. Those systems include metabolic processes, inflammatory responses, vascular function, sleep, and cellular repair mechanisms. When functioning properly, they maintain the brain's internal environment and protect against damage. When they become dysregulated, they create conditions that allow pathological changes to take hold.

Now, here is something critical to understand before we go further. These changes do not occur overnight. They develop gradually, often beginning decades before the first signs of memory loss or cognitive decline. By the time symptoms appear, the underlying processes have been active for years, if not longer. That long preclinical phase represents both a challenge and an opportunity — and it is exactly why everything we are going to discuss today matters so much.

The Brain's Key Regulatory Systems

So let's walk through these regulatory systems one by one, because understanding them is the foundation of everything else.

Metabolic Regulation

The first is metabolic regulation. The brain requires a continuous supply of energy, primarily in the form of glucose. When insulin signaling becomes impaired, the brain's ability to use glucose efficiently is compromised. This leads to an energy deficit that affects cognitive function and increases vulnerability to degeneration — and over time, this metabolic dysfunction may contribute directly to the development of Alzheimer's pathology.

Inflammatory Regulation

Inflammatory regulation is equally important. Inflammation is a natural and necessary part of the immune response, but it must be tightly controlled. When it becomes chronic, it can damage healthy tissue, disrupt neural signaling, and accelerate the kind of pathological changes we see in Alzheimer's disease. Persistent low-grade inflammation is one of the most consistent factors linked to increased Alzheimer's risk.

Vascular Regulation

Then there is vascular regulation — ensuring the brain receives adequate blood flow. The brain relies on a dense network of blood vessels to deliver oxygen and nutrients while removing waste products. Even minor, sustained disruptions in circulation can contribute to cognitive decline and structural changes in the brain over time.

Sleep Regulation

Sleep regulation is next, and this one often surprises people. During deep sleep, the brain activates a clearance system that flushes out metabolic waste — including the kinds of protein buildup associated with Alzheimer's disease. When sleep is chronically disrupted, that waste accumulates. It is one of the more direct connections we have between a daily habit and Alzheimer's pathology.

Environmental Toxicity

And then there is environmental toxicity, which deserves its own moment of attention. Exposure to air pollution, heavy metals like lead, mercury, and cadmium, pesticides, and particularly aluminum, is strongly linked to increased risk and faster progression of Alzheimer's disease. Post-mortem examinations show that many people with Alzheimer's have far higher concentrations of aluminum in their brain tissue than healthy individuals — aluminum that is not normally found there at all. These toxins appear to drive Alzheimer's pathology by promoting neuroinflammation, inducing oxidative stress, and interfering with the brain's ability to clear damaged proteins.

Neuroplasticity and Cognitive Reserve

Finally, there is neuroplasticity — the brain's remarkable ability to adapt. Through learning, experience, and engagement, the brain can form new connections and strengthen existing ones. This adaptability creates a buffer against damage, allowing the brain to maintain function even when underlying changes are present. Researchers refer to this buffer as cognitive reserve, and we will come back to that concept shortly because it is central to understanding why two people with similar pathology can have very different outcomes.

Before we move on, I want to emphasize one thing about all these systems: they are not independent of one another. They are deeply interconnected, meaning disruption in one area almost always affects the others. That interconnectedness is actually the key to understanding both why Alzheimer's is so complex — and why lifestyle intervention is so powerful. Let's talk about that now.

The Role of Lifestyle in Brain Health

One of the most significant developments in Alzheimer's research is the growing recognition that lifestyle plays a central role in shaping brain health. Large-scale studies have demonstrated that targeted behavioral changes can genuinely improve cognitive function and reduce risk. This challenges the long-standing belief that Alzheimer's is largely determined by genetics. While genetic factors do play a role, they interact with environmental and lifestyle influences in complex ways — meaning that even individuals with increased genetic risk can benefit meaningfully from the kinds of interventions we are about to discuss.

Exercise

Physical activity is one of the most well-studied. Regular exercise improves blood flow to the brain, enhances neuroplasticity, reduces chronic inflammation, and supports metabolic health — in other words, it positively touches nearly every regulatory system we just covered, all at once. And here is something worth adding: research now shows that exercise is also one of the most effective ways to restore a healthy gut microbiome, which brings us to an area of emerging science that the field is watching very closely.

The Gut-Brain Axis

Scientists now recognize that the balance of bacteria in your digestive tract plays a direct role in Alzheimer's risk through what is called the gut-brain axis. When the gut microbiome is disrupted — a state called dysbiosis — harmful microbial products can cross the blood-brain barrier, triggering the very neuroinflammation and cellular dysfunction we have been discussing. Probiotic supplementation, particularly strains like Lactobacillus plantarum, has shown early promise in alleviating mild cognitive impairment. And the lifestyle practices we are covering today — exercise, nutrient-dense eating, quality sleep — also happen to be among the most effective ways to restore and maintain a healthy gut microbiome, which is a compelling reminder of just how interconnected all of this truly is.

Nutrition

Nutrition is another critical component of brain health, and the research has become increasingly specific about what works. Diets rich in whole foods, healthy fats, and essential nutrients help stabilize blood sugar levels, reduce oxidative stress, and support overall brain function. Diets high in processed foods and added sugars do the opposite — contributing to both metabolic dysfunction and inflammation.

One specific dietary approach gaining additional momentum is the ketogenic diet. Recall that one of the brain's central vulnerabilities in Alzheimer's is its impaired ability to use glucose for energy. By dramatically reducing carbohydrates and increasing healthy fats, the ketogenic diet shifts the body's fuel source to molecules called ketone bodies — essentially an alternative energy supply for a brain struggling to process glucose. Research shows this shift reduces oxidative stress, calms neuroinflammation, and improves cognitive performance in early clinical studies. It is not appropriate for everyone, so working with a qualified healthcare provider is essential — but as a targeted nutritional strategy, it is one of the more exciting developments in the field.

Closely related — and more accessible for many people — is intermittent fasting. Rather than changing what you eat, it focuses on when you eat. Preclinical research shows it enhances hippocampal neurogenesis, strengthens synaptic plasticity, and reduces neuroinflammation in Alzheimer's animal models. It has also been shown to enrich beneficial gut bacteria and help restore circadian rhythms that are frequently disrupted in Alzheimer's patients — connecting it back to both the gut-brain axis and sleep regulation we discussed earlier. Robust human clinical trials are still underway, but the mechanistic evidence is compelling.

Supplements That Support Brain Health and Help Prevent Alzheimer's Disease

This brings us to supplementation. And I want to be clear: there is no single supplement that prevents or treats Alzheimer's disease on its own. But there are several that, used in combination, can be genuinely therapeutic — particularly because they target the same regulatory systems we have been discussing throughout this episode.

Curcumin

The first is curcumin — the active compound in turmeric, used for centuries in traditional medicine and one of the most extensively researched natural compounds in Alzheimer's science. It is a potent antioxidant and anti-inflammatory agent that protects neurons from oxidative damage and helps regulate the very pathological processes we have been discussing. A 2025 research review found meaningful benefits at around 800 milligrams per day. One important note: standard curcumin has low bioavailability, so look for formulations enhanced with piperine — black pepper extract — or liposomal delivery to ensure proper absorption.

DHA (Omega-3 Fatty Acids)

Next is DHA — docosahexaenoic acid — the main omega-3 fatty acid in the brain. DHA is found in the membranes surrounding nerve cells and is essential for normal nervous system function. Studies show that Alzheimer's patients with lower DHA levels experience faster cognitive decline — including worsening memory and executive function — compared to those with higher levels. Omega-3s help by promoting brain plasticity and supporting the brain's overall structural integrity.

B Vitamins

Next are specific B vitamins — B6 as pyridoxine-5-phosphate, methylated B9 or methyl tetrahydrofolate, and methylated B12 or methylcobalamin. This combination is particularly important for controlling levels of a compound called homocysteine — an inflammatory chemical that should be periodically checked in routine bloodwork. Homocysteine tends to run high in elderly patients and is associated with strokes, coronary artery disease, and dementia. Bringing it under control with these B vitamins has been shown to improve immediate and delayed memory recall, verbal fluency, processing speed, sustained attention, and working memory.

Phosphatidylserine

Another one of my personal favorites is phosphatidylserine — a compound deeply involved in brain function. Clinical trials have shown promising results, including improved learning and language abilities. What makes phosphatidylserine particularly interesting is evidence suggesting it produces long-term structural changes in the brain, rather than just short-term metabolic ones.

Melatonin

Another supplement worth highlighting connects directly back to our earlier discussion of sleep. Melatonin is now recognized as far more than a sleep aid. A comprehensive review published in Molecular Psychiatry in 2024 concluded it has significant potential for improving cognitive function in Alzheimer's, and a 2025 meta-analysis of randomized trials confirmed it significantly improved cognition in adults with cognitive impairment. It crosses the blood-brain barrier, acts as a fat-soluble antioxidant, and reduces neuroinflammation. As a widely available, low-risk supplement, it is one of the more practical additions to a brain health protocol.

Lion's Mane

Then there is lion's mane — an edible mushroom used for centuries in traditional Chinese medicine for its neuroprotective, anti-inflammatory, and antioxidant properties. Research shows that lion's mane increases levels of acetylcholine and choline acetyltransferase, both important for cognitive function, and has shown particular promise in improving daily functioning for patients with mild cognitive impairment and Alzheimer's disease.

Spermidine

And the last supplement I want to mention is one you may not have heard of yet: spermidine. Found naturally in wheat germ, aged cheeses, mushrooms, and soybeans, spermidine is a potent natural activator of autophagy — the body's internal cellular cleanup system that clears away damaged proteins and cellular debris. This mechanism is directly relevant to the brain's ability to maintain a healthy internal environment over time. Early clinical trials have shown cognitive benefits in older adults with dementia after just three months of supplementation, with larger trials currently underway. It is early-stage research, but the mechanism is sound and the safety profile looks favorable.

Building Cognitive Reserve Through Engagement and Connection

Beyond supplementation, cognitive engagement is a powerful tool in its own right. Activities that challenge the brain — learning new skills, solving complex problems, engaging in mentally stimulating work — help build that cognitive reserve I mentioned earlier. To put it plainly: cognitive reserve is the brain's ability to compensate for damage by rerouting through alternative pathways. It is built gradually over a lifetime through education, mental stimulation, and rich life experiences. And it helps explain why some individuals maintain strong cognitive function even when their brains show significant pathology — while others with similar pathology experience steep decline. The difference often comes down to reserve.

Social connection adds yet another layer of protection. Strong relationships support emotional well-being and reduce chronic stress, both of which influence the very regulatory systems we have been discussing. Isolation, on the other hand, has been consistently linked to increased risk of cognitive decline.

And as we covered in the regulatory systems section, sleep is absolutely foundational here.

Consistent, high-quality sleep supports memory consolidation, emotional regulation, and that critical clearance of metabolic waste from the brain. It is one of the simplest and most impactful things a person can do.

Why a Multidomain Approach Matters

Now, you may have noticed something as we have gone through all of this: no single intervention covers everything. Exercise helps, but it does not address sleep deprivation. Good nutrition helps, but it does not build cognitive reserve on its own. This is precisely why researchers have moved toward what are called multidomain approaches — strategies that target several regulatory systems at the same time. When multiple interventions are combined, their effects are amplified through the same kind of interconnected synergy we talked about earlier. And when they are practiced consistently as long-term habits rather than temporary fixes, those small changes accumulate into a durable foundation of resilience.

The Case for Early Intervention

This brings us to one of the most important practical points of this entire conversation: the need for early intervention. Because Alzheimer's develops silently over decades — as we established at the very beginning — waiting until symptoms appear significantly limits what can be done. Advances in biomarkers, imaging, and genetic testing now make it possible to identify risk long before cognitive decline is visible, creating a window during which the brain is still highly adaptable and intervention is most effective. But that window requires ongoing attention. Regulation is not a one-time effort. The body's systems are dynamic, constantly responding to internal and external influences, which means prevention is a continuous, proactive practice — not a destination you arrive at.

Prevention Is Regulation: A New Way of Thinking About Brain Health

I want to close by addressing something that I think holds many people back from even trying. The idea that cognitive decline is simply an inevitable part of aging is deeply embedded in our culture. But the evidence does not support that fatalism. While aging does increase risk, it does not determine outcome. As we just discussed, cognitive reserve can allow people to maintain strong function even in the presence of pathology. Aging and Alzheimer's are not the same thing — and the gap between them is where lifestyle, regulation, and intention live.

The concept that prevention is regulation represents a fundamental shift in how we understand this disease. It moves the focus away from late-stage treatment and toward the ongoing maintenance of balance. By supporting metabolic health, managing inflammation, clearing waste through quality sleep, staying physically and mentally active, protecting against environmental toxins, maintaining a diverse and healthy gut microbiome, and keeping strong social connections — each of us can actively shape our cognitive future. Alzheimer's is no longer seen as an unavoidable outcome, but as a condition shaped by the choices and conditions that accumulate over an entire lifetime.

The brain is dynamic, responsive, and capable of change. And understanding that opens the door to a more proactive and hopeful future — one in which brain health is not simply preserved, but actively cultivated, every single day.

Well, that's all for this episode. Please tune in in two weeks for another Science of Self-Healing episode. Till then — be well.

Thank you for your time today, and remember that this podcast is made possible by the Bioregulatory Medicine Institute, also known as BRMI, a nonprofit, global, non political, non commercial institute to promote the science and art of bioregulatory medicine. We extend our gratitude to each and every one of you for listening today, and if you haven't already, make sure to visit us at brmi.online. A treasure trove of invaluable information awaits you there. Connect with us across various social media platforms as well. Come and become a member of our thriving tribe. If you've enjoyed today's episode, we invite you to show your support by rating us, leaving us a review, or sharing the podcast within your circle. Our podcast and mission flourish through sharing, and your participation means the world to us. Our organization is sustained by donations, each of which is tax deductible and fuels projects like this. Visit our website, brmi.online, to contribute or simply to explore the wealth of uncensored and impartial information we offer. No contribution is too small. In just two weeks, we'll be back delving into another captivating topic. Until then, we thank you once again for listening. May wellness and wisdom be your path. Be well.

Bioregulatory medicine is a total body (and mind) approach to health and healing that aims to help facilitate and restore natural human biological processes. It is a proven, safe, gentle, highly effective, drugless, and side-effect-free medical model designed to naturally support the body to regulate, adapt, regenerate, and self-heal. BRMI is a non-commercial 501(c)(3) foundation and will expand and flourish with your support. Our goal is to make bioregulatory medicine a household term.

This article is for informational purposes only and is not intended to be a substitute for the direct care of a qualified health practitioner who oversees and provides unique and individualized care. The information provided here is to broaden our different perspectives and should not be construed as medical advice, diagnosis, or treatment.