How many days do you think it takes to start losing a skill you’ve had for decades?

 

For me, the answer was three.

 

A few weeks ago, I got into a self-driving car for the first time and let it take me around my town. It was smooth. It was relaxing. And honestly, it was a little bit magical. I sat there with my hands barely on the wheel, watching the car make its own decisions.

 

Three days later, I got behind the wheel of my own car again. This time with no assistance. Just me. And something felt off. It was slightly difficult to manage the heavy traffic on a busy highway. My sense of the road felt a little rusty.

 

It had only been three days, and I could already feel the difference.

 

That small moment stuck with me. Because as a neurologist who has spent forty years studying the brain, I knew exactly what was happening. My brain had not lost the skill of driving. But the parts of my brain responsible for it had quietly relaxed, because for three days they simply did not have to work that hard.

 

Negative Neuroplasticity: The Part Nobody Talks About

 

This is what I call negative neuroplasticity.

 

Your brain is not fixed. It is not a piece of hardware that stays the same your whole life. Your brain is living tissue, and it changes its shape, its structure, and its strength based on how you use it every single day.

 

Think of your brain like a muscle. If you work your biceps and triceps, they grow. If you stop using them, they shrink. Your brain grows and shrinks in the same way, in response to your lifestyle and your environment. The parts you use and challenge often get stronger. That is positive neuroplasticity. The parts you stop using quietly fade and shrink. That is negative neuroplasticity.

 

And we have seen this before, long before AI arrived.

 

When calculators became common, our collective ability to do math in our heads got weaker. When GPS became common, our sense of direction got weaker too. So here is the honest question all of us need to ask: if AI can now write our emails, solve our problems, remember our facts, and even drive our cars, what happens to the parts of our brains that used to do all of that work?

 

What the Research Is Starting to Show

 

There is new research beginning to answer that question, and the results are worth paying attention to.

 

In one study, researchers had people write essays in one of three ways: completely on their own, using a search engine, or using ChatGPT. The whole time, machines measured their brain activity. The group that used ChatGPT showed the weakest brain engagement of the three. And afterward, many of them could barely remember what they had just written, because in a very real sense, they had not actually written it themselves.

 

We are seeing the same pattern in medicine.

 

In one study, experienced doctors used an AI tool to help them spot polyps during colonoscopies. After they grew used to working alongside the AI, their detection rate without it actually dropped, compared to how they performed before they ever used the tool. These were skilled physicians, quietly losing a bit of their edge, simply because the tool had been doing that part of the thinking for them.

 

To me, this all makes perfect sense. The activity in the parts of our brain that we stop using and challenging gradually fades away.

 

This Is Not About Fearing AI

 

I want to be very clear about something, because this is not a message about fearing AI or rejecting it.

 

I use AI every single day. I think of it almost like one of my staff members. I let it handle the tedious, minor parts of my work, the things that do not require my judgment or my creativity. But I still do the hard thinking myself. The writing. The decisions. The real work. Because I know that “use it or lose it” applies to my brain just as much as it applies to my muscles.

 

Here is the strange thing. We already understand this instinct perfectly well when it comes to our bodies. We just have not caught up yet when it comes to our brains.

 

Think about how life used to require constant movement. People walked to work. They rolled their windows up with their own hands. They pushed in a clutch and changed gears with their own feet, over and over, every time they drove. All of that built-in movement quietly kept our bodies strong, without anyone ever thinking of it as exercise.

 

Today, machines do almost all of that work for us. We press a button, and the window rolls up. We slide into an automatic car and never touch a gear again. And what did we do as a society, once daily life stopped giving us that movement for free? We built gyms. We started going to Zumba classes, yoga classes, and Pilates. We began taking long walks on purpose, specifically to give our muscles the workout that daily life no longer provided automatically.

 

This is exactly the position we are now in with our brains.

 

AI is quietly becoming the automatic window button and the automatic transmission for our minds. It removes the friction, and it feels wonderful in the moment. But if we are not careful, we are quietly losing the mental exercise that daily life used to give us for free, when we had to remember phone numbers, do math, navigate our own cities, and write our own thoughts from a blank page.

 

Six Ways I Build a Gym for My Own Brain

 

So, just as we built gyms for our bodies once our environment stopped providing free exercise, we now need to build a gym for our brains. These are small, deliberate exercises we choose on purpose, precisely because daily life no longer forces us to do them.

 

Here are six exercises I personally do. Not because I read them in a textbook, but because I know they are important for keeping my own brain sharp.

 

1. I minimize using GPS on purpose: When I am driving somewhere I have been before, I make myself recall the way, even if it takes an extra moment of thinking. That small effort keeps my hippocampus and other memory areas active and engaged.

 

2. I memorize names: I work to remember the names of all my students and every person I meet, every single day. Holding a name in my mind and pulling it back later sounds almost too simple to matter. But that daily repetition is exactly what keeps my memory strong, the same way a short walk keeps my heart healthy.

 

3. I protect at least one block of deep, unassisted thinking: No AI, no shortcuts. Just my own mind, working hard on a project from beginning to end.

 

4. I keep authorship of anything that truly matters. I let AI carry the tedious, minor parts of my work, but the real writing, the real decisions, and the real thinking stay mine.

 

5. I take up hobbies that challenge my mind: Learning new dance steps is at the top of my list, and this one is for pure joy as much as it is for my brain. I am willing to bet you already have a small wish list in the back of your mind, something you have always wanted to learn from scratch or finally get better at. The science is clear that a new, challenging skill grows your brain in a matter of weeks. So pick the one hobby that sounds the most fun, and enjoy practicing it until you get really good at it.

 

6. I use AI to challenge me, not replace me: After I write an essay or prepare a presentation, I ask AI to critique my work and push back on it. I also use AI as a tutor when I need to understand something complex. In other words, I use AI to stimulate my brain, not to replace it.

 

The Brain You Have Is the Result of Your Daily Choices

 

So here is what I want to leave you with.

 

AI is not going to make you stupid. But how you use it will absolutely shape whether your brain stays sharp or slowly grows weaker.

 

Your brain, like your body, becomes what you ask of it every single day. The brain you have, sharp or dull, strong or weak, is the result of your daily choices. Just as the shape of your body is in your hands, so is the shape of your brain.

 

 

Dr. Majid Fotuhi is a Harvard- and Johns Hopkins-trained neurologist, bestselling author of The Invincible Brain (USA TODAY Bestseller), and one of the world’s leading experts on brain health and cognitive performance. He has spent more than three decades studying the brain’s capacity for growth and repair. To discover your brain health score and receive a personalized 10-page report, take the free Invincible Brain Assessment at invincible.drfotuhi.com.

 

📺 Watch on Dr. Fotuhi’s YouTube Channel.

 

How Ai is slowly destroying your brain health – Dr. Fotuhi

 

Keep up with Dr. Fotuhi on LinkedIn & Instagram.

Let me start with a simple question.

 

If you were managing a $10 million investment portfolio, would you put all of it into a single stock?

 

Of course not. You would diversify. You would spread your money across different types of assets. You would manage your risk, monitor your performance, and make adjustments over time. That is simply what anyone serious about money does.

 

Now I want you to think about your brain the same way.

 

Your Brain Is an Asset

 

Your brain is an asset too. In fact, it may be the single most important asset you have. It allows you to think, make decisions, solve problems, lead your organization, manage your finances, and maintain your relationships.

 

And yet most of us do not manage our brain the way we manage a financial portfolio. Instead, we wait. We wait until there is a problem. We wait until our memory starts to slip, or until we are exhausted, stressed, and burned out. And only then do we ask, “What can I do about it now? Do I have early signs of Alzheimer’s disease?”

 

I believe we should approach brain health very differently. We should look at the brain the way we look at a financial portfolio. I call it your brain portfolio.

 

Just as a financial portfolio has different asset classes, your brain portfolio has five major assets: exercise, sleep, diet, stress management, and brain training.

 

And the key idea, the one I want you to hold onto, is diversification. You do not want to pour all of your brain health investment into a single area. Exercise is extremely important, but exercise alone is not enough. A good night’s sleep is important, but sleep alone is not enough. Eating well is important, but diet alone is not enough. You need to invest across all five. Each one contributes something different, and together they build a far stronger brain.

 

Let me walk you through each asset.

 

Asset One: Exercise

 

Think of exercise as one of the highest-performing assets you have.

 

When you exercise, you are not simply strengthening your muscles and your heart. You are increasing blood flow to the brain, supporting the growth and maintenance of brain connections, and helping to regulate blood pressure, glucose, and inflammation, all of which matter for optimal brain health.

 

Exercise also helps grow new neurons in the hippocampus, the memory center of your brain. And it strengthens the frontal lobes, the regions critical for emotional regulation and decision-making.

 

So exercise is not just a fitness investment. It is an important investment in your brain capital.

 

Asset Two: Sleep

 

Sleep is your brain’s maintenance department.

 

While you sleep, your brain is not shutting down. During deep sleep, your brain clears out the metabolic waste that accumulates throughout the day. This remarkable cleaning and rinsing process is your brain’s waste management system. At the same time, the parts of your brain responsible for consolidating memories, regulating emotions, and making decisions are refreshed and restored.

 

If you consistently under-invest in sleep, eventually you pay the price. The waste that does not get rinsed out accumulates night after night, week after week, year after year. Over time, that buildup contributes to significant brain shrinkage.

 

Regularly sleeping fewer than six hours a night carries serious long-term consequences, including an accelerated risk of developing Alzheimer’s disease.

 

Asset Three: Diet

 

I think of diet as the raw material your brain uses every single day.

 

Your brain requires energy, essential fats, vitamins, minerals, and other nutrients to function properly. A good diet provides the building blocks for your brain cells and blood vessels.

 

So when you choose what to eat, you are not simply deciding what goes into your stomach. You are deciding what resources you are providing to one of the most valuable organs in your body. You are supplying the raw material your brain needs to function at its peak.

 

Asset Four: Stress Management

 

Your fourth asset is stress management, and I think of it as risk management for the brain.

 

Some stress is normal and even healthy. But chronic, unmanaged stress can become a major risk factor for both mental and physical health.

 

You do not need to eliminate every stressful situation, which is neither possible nor the goal. What you need is to reduce stress where you can and learn to manage the rest effectively. That means learning how to recover from stress: creating periods of calm, maintaining meaningful relationships, and making sure your brain has enough time to recharge.

 

Asset Five: Brain Training

 

The fifth asset is brain training, and here the rule is simple: your brain is a use-it-or-lose-it organ.

 

When you learn something new, you challenge your attention and stimulate the parts of your brain responsible for problem-solving. When you play music or take on intellectually demanding activities, you give your brain the chance to build new neural networks.

 

The regions you stimulate with new hobbies and new learning, such as picking up a new language, literally grow larger. It works just like your muscles, which grow in proportion to how much you challenge them with exercise.

 

Your brain remains an active, adaptable asset throughout your entire life, not just in childhood. You can expand and grow your brain at any age.

 

The Real Power Is in the Portfolio

 

Here is the part that matters most. These five assets do not operate independently. They interact.

 

Exercise can improve your sleep. Better sleep improves your attention and emotional regulation. A healthy diet supplies the energy and nutrients your brain needs to function well. Stress management improves both your sleep and your decision-making. And brain training gives your brain the stimulation it needs to stay adaptable.

 

The real power comes from the portfolio as a whole.

 

This is exactly how we think about financial diversification. We do not ask, “Which single stock will make me rich?” We ask, “How can I build a diversified portfolio that performs well and manages risk over time?”

 

We should ask the same question about our brains: How can I build a diversified brain portfolio that helps me maintain my memory, focus, creativity, resilience, and independence as I grow older?

 

Monitor, Rebalance, and Start Now

 

There is one more principle from finance worth borrowing. You need to monitor your portfolio.

 

You do not invest once and forget about it. You review your performance, identify your weaknesses, rebalance, and make adjustments when your circumstances change. The same should be true for your brain health.

 

Maybe your exercise is strong, but your sleep is weak. Maybe your diet is excellent, but you are carrying too much chronic stress. Maybe you are physically active but intellectually under-stimulated.

 

The goal is not perfection. The goal is balance.

 

And you may be wondering when the best time is to start paying attention to your brain portfolio. The answer is now. When it comes to your brain, prevention is a far better strategy than waiting for a major problem to appear.

 

A Note for Executives and Leaders

 

For executives, business leaders, and CEOs, I think this concept is especially important.

 

You spend your professional life managing financial assets, human capital, operational risk, and long-term growth. But none of those assets matter very much if your own brain is not functioning at its peak. Your brain is the executive system behind every single decision you make.

 

So I encourage you to think about your brain the same way you think about your financial portfolio. Diversify. Invest consistently. Manage your risk. Monitor your performance. And rebalance when necessary.

 

Your brain is not simply another organ in your body. It is the most important asset you have, and it is built to grow and expand throughout your life.

 

Look into the five pillars of your brain health and build a brain portfolio that will last you a lifetime. The earlier you start, the more likely you are to enjoy strong cognitive returns for many years to come.

 

That is how you become not just a successful executive, but a brain super ager.

 

 

Dr. Majid Fotuhi is a Harvard- and Johns Hopkins-trained neurologist, bestselling author of The Invincible Brain (USA TODAY Bestseller), and one of the world’s leading experts on brain health and cognitive performance. He has spent more than three decades studying the brain’s capacity for growth and repair. To discover your brain health score and receive a personalized 10-page report, take the free Invincible Brain Assessment at invincible.drfotuhi.com.

 

 

📺 Watch the full video on Dr. Fotuhi’s YouTube channel

https://youtu.be/AegcfrO5BPI 

 

Keep up with Dr. Fotuhi on LinkedIn & Instagram.

“I love you from the bottom of my heart.”

 

We have all said it, or heard it. It is one of the oldest ways we express love, and most of us never stop to question it. We imagine that love lives deep in our heart.

 

But here is the surprising truth: your heart is made up of muscle, and it is not capable of experiencing emotions. Love does not begin in your heart. Love begins in your brain.

 

Let me explain what actually happens.

 

The Message Starts in Your Brain and Ends in Your Chest

 

The feeling of love emerges from the interactions of several brain areas the regions that handle emotion, motivation, reward, and social bonding. When you fall in love with someone, these areas glow with activity. They, in turn, stimulate the part of your brain that regulates hormones in your blood, such as adrenaline.

 

The adrenaline then makes your heart beat faster. That is why, when you see someone you love, your heart pounds.

 

The message begins in your brain and ends up in your heart. You cannot feel the glowing of activity in your brain, but you can feel the pounding of your heart in your chest. And so, understandably, we have spent centuries believing it is the heart that sparks with love.

 

Every Emotion You Feel Is Built by Your Brain

 

I am a neurologist, and I have spent much of my career studying the brain, mostly at Johns Hopkins and Harvard Medical School. One thing that never stops amazing me is this: every emotion we experience fear, joy, excitement, pride, sadness is created by the brain.

 

Different emotions involve different groups of brain regions working together as a network. Love is no exception. In fact, love gives us a beautiful window into how the human brain works when it comes to bonding and forming lasting relationships.

 

Feelings of love also engage the dopamine reward and motivation system. It is the activity of dopamine pathways in the brain that leads to the pleasure, joy, excitement, and motivation that make you want to keep seeing the person you love, over and over again.

 

What Scientists Saw Inside the Brain of Someone in Love

 

The research that uncovered this is fascinating.

 

Helen Fisher and her colleagues studied people who were intensely in love. While these volunteers lay inside a brain MRI scanner, the researchers showed them photographs of the person they loved. Something remarkable happened. The dopamine-rich areas deep inside the brain, including a region called the ventral tegmental area, or VTA, became intensely more active.

 

That surge of dopamine is what gives you the intense sense of pleasure about the person you love, and it is what motivates you to want to be near them at all times.

 

Animal studies help us understand the biology of love and lasting relationships even further. Prairie voles are small, monogamous rodents that form long-lasting pair bonds. Researchers have found that the dopamine system in their brains surges when these animals have to climb over a fence to seek out and reach their partner.

 

In other words, it appears that even the act of seeking the one you love can give you some of the same joy you feel when you are with them. The dopamine pathways in the brain, along with a hormone called oxytocin, help people who love each other bond and stay together.

 

Love Is Bigger Than Romance

 

As we research the biology of love, we have discovered something profound: our brains have evolved to connect with other human beings. Love and connection are part of what makes us human.

 

And this is where I want to expand the meaning of love. When we hear the word “love,” we often think about romance. But the human brain does not reserve something as important as love for romance alone. There is also the love between parents and children.

 

A few years ago, I saw something in the news that I will never forget. After the tsunami in Japan, photographs surfaced of mothers who had been found still holding their children, having used the last moments of their lives shielding them from the water. These women, in the most extreme situation imaginable, sacrificed their own lives for their children. Their love for their child outlived their instinct to save themselves.

 

I remember looking at those images and thinking, “I would do that too.” As I am sure almost every parent would. That is the power of love in the brain.

 

These relationships may look different from one another. But they all involve the same dopamine and oxytocin network in the brain that helps us connect, care, trust, and protect one another.

 

Why Heartbreak Physically Hurts

 

There is another side to this.

 

When an important relationship is lost, the pain can be very real. Research on social rejection and loss has shown that social pain can engage some of the same brain regions involved in physical pain.

 

So if you have ever experienced heartbreak and thought, “Why does this hurt so much?” there is a neurological reason for it. Some of the same brain areas that light up with physical pain also light up with the emotional pain of losing someone you love.

 

Your brain takes social connection seriously. From an evolutionary point of view, belonging to a group was essential for survival.

 

The Lesson From the Longest Study of Human Life

 

This brings me to something I believe is even more important than romantic love: human connection is a genuine part of brain health.

 

One of the longest-running studies of human life is the Harvard Study of Adult Development, which has followed people for more than eight decades. One of its most important lessons is remarkably simple: the quality of our relationships matters enormously for our health and happiness. People who have stronger, more supportive relationships tend to be healthier and live longer.

 

And this is not just one study. Large studies and meta-analyses involving hundreds of thousands of people have found associations between loneliness and a higher risk of dementia, and between social isolation and a higher risk of premature death.

 

I want to be careful here. That does not mean loneliness automatically causes dementia, or that one loving relationship guarantees a longer life. But the message from decades of research is remarkably consistent: we are social creatures. Our brains and bodies do better when we have meaningful connections.

 

Don’t Let Technology Replace What Makes Us Human

 

So as AI becomes more present in our lives, I think we have a responsibility: do not let technology replace the relationships that make us human.

 

Protect the connections you already have. Call your parents. Check on your friends. Make time for the people who matter. And be willing to let new people into your life.

 

Every time you reach out to someone, listen deeply, share a laugh, offer comfort, or allow someone to help you, you are participating in the life of another human being. You are also giving your own brain an experience it was designed to have. Connection. Belonging. Love.

 

A Challenge for You This Week

 

So now, I have a challenge for you.

 

Think of three people who matter to you. Not three people you follow. Not three people you text with an emoji. Three people who truly matter.

 

And sometime this week, reach out to them. Call them. Meet them. Tell them what they mean to you. Tell them you love them from the bottom of your heart, even though you now know your love for them actually resides in your brain, not your heart.

And know this: the connection you share with them will contribute to your own brain vitality and longevity for years to come.

 

 

Dr. Majid Fotuhi is a Harvard- and Johns Hopkins-trained neurologist, bestselling author of The Invincible Brain (USA TODAY Bestseller), and one of the world’s leading experts on brain health and cognitive performance. He has spent more than three decades studying the brain’s capacity for growth and repair. To discover your brain health score and receive a personalized 10-page report, take the free Invincible Brain Assessment at invincible.drfotuhi.com.

 

📺 Watch https://youtu.be/OwfFXOhhBKY on Dr. Fotuhi’s YouTube Channel.

 

Keep up with Dr. Fotuhi on LinkedIn & Instagram.

 

 

 

References

 

1. Aron, A., Fisher, H., Mashek, D. J., Strong, G., Li, H., & Brown, L. L. (2005). Reward, motivation, and emotion systems associated with early-stage intense romantic love. Journal of Neurophysiology, 94(1), 327–337.

 

2. Eisenberger, N. I., Lieberman, M. D., & Williams, K. D. (2003). Does rejection hurt? An fMRI study of social exclusion. Science, 302(5643), 290–292.

 

3. Fisher, H., Aron, A., & Brown, L. L. (2005). Romantic love: An fMRI study of a neural mechanism for mate choice. Journal of Comparative Neurology, 493(1), 58–62.

 

4. Holt-Lunstad, J., Smith, T. B., Baker, M., Harris, T., & Stephenson, D. (2015). Loneliness and social isolation as risk factors for mortality: A meta-analytic review. Perspectives on Psychological Science, 10(2), 227–237.

 

5. Liu, Y., & Wang, Z. X. (2003). Nucleus accumbens oxytocin and dopamine interact to regulate pair bond formation in female prairie voles. Neuroscience, 121(3), 537–544.

 

6. Livingston, G., Huntley, J., Sommerlad, A., et al. (2020). Dementia prevention, intervention, and care: 2020 report of the Lancet Commission. The Lancet, 396(10248), 413–446.

 

7. Pierce, A. F., Protter, D. S. W., Watanabe, Y. L., Chapel, G. D., Cameron, R. T., & Donaldson, Z. R. (2024). Nucleus accumbens dopamine release reflects the selective nature of pair bonds. Current Biology, 34(3), 519–530.

 

8. Waldinger, R., & Schulz, M. (2023). The Good Life: Lessons from the World’s Longest Scientific Study of Happiness. Simon & Schuster.

If you are an executive who works long hours and lives under a heavy load of stress, I want you to read this closely. I have some good news and some bad news about your brain. But first, let me tell you about a patient of mine.

 

He was a 49-year-old hedge fund manager. Over two years, he had become the most successful person at his firm and had been promoted twice. On the surface, everything was going right.

 

Underneath, though, he had started to notice changes. He was getting grumpy with his family more easily. He would forget the names of his own clients. During afternoon meetings, he would feel foggy and struggle to keep up with everyone else in the room. And because his father had struggled with dementia late in life, he had begun to fear this was the start of Alzheimer’s disease.

 

My first job was to figure out what was actually driving those changes.

 

The Belief That Holds Most Executives Back

 

Most high performers assume their mental sharpness will either hold up with age or slowly slip away, and that there is very little they can do about it. They picture the brain as a fixed structure, like a computer you cannot upgrade.

 

That is absolutely wrong.

 

Your brain is much more like a portfolio. It appreciates with the right investment. It depreciates with neglect. And either way, it is compounding, for better or worse, every single day.

 

A short temper, memory lapses, and afternoon fog are not signs of permanent damage. They are signals that your brain portfolio needs more attention. As my patient came to learn, these warning signs can be reversed.

 

The Bad News: How Your Routine May Be Shrinking Your Brain

 

Let me start with the bad news, because it matters.

 

Sustained stress keeps a hormone called cortisol elevated in your blood. Over time, elevated cortisol is linked to shrinkage in parts of your frontal lobes and your hippocampus, the very regions responsible for decision-making, executive function, leadership, learning, memory, and emotional regulation.

 

Think of chronic stress as an unhedged risk exposure. It sits quietly on your balance sheet, and if you never address it, it erodes the asset every single day it goes unmanaged.

 

Stress is not the only factor. A sedentary lifestyle, an irregular sleep pattern, a poor diet, and a lack of downtime and relaxation all shrink your cortex and hippocampus over time. And the more your brain atrophies, the worse you function, which, for a leader whose work depends on judgment, is the entire game.

 

The Good News: Atrophy Can Be Reversed

 

Now the good news, and it is substantial.

 

Based on compelling scientific evidence, atrophy in the frontal lobe and hippocampus can be reversed through what I call the five pillars of brain health.

 

Think of the five pillars as five separate investments in your brain. Each one alone is enough to make a real difference in your cognitive performance. But when you combine them, the returns do not just add up. They compound. Imagine what your brain will look like when all five are working for you at once.

 

1. Exercise: Aerobic activity, such as walking for an hour, raises levels of a molecule called BDNF, which actively supports growth in the brain. This is real capital appreciation on your brain asset, not vague wellness advice. It is one of the most direct and measurable levers available to you.

 

2. Sleep: Your brain has an innate cleanup operation called the glymphatic system, and it runs hardest during deep sleep, clearing out the metabolic waste that builds up during a normal day of thinking and working. Sleep fewer than six hours a night, and that clearance does not finish completely. Over time, the deficit compounds night after night, the same way unpaid interest compounds on a balance. Sleep is not rest for your brain. It is an active maintenance system that protects your principal.

 

3. Diet: What you eat becomes the literal building material for your brain cells. The Mediterranean diet, rich in olive oil, leafy greens, fish, nuts, and berries, supplies the omega-3 fatty acids and antioxidants that calm the inflammation eroding neurons over time. Think of it as the raw material you feed into the factory. Even the best machinery produces poor output if the inputs are poor.

 

4. Stress regulation. This is trainable, not a personality trait, and it functions as your hedge. Something as simple as breathing slowly for two minutes has real benefits for your brain, both in the short term and the long term.

 

5. Novelty and cognitive challenge. Brains that keep learning something genuinely new build what is called cognitive reserve, a protective buffer that makes the whole portfolio more resilient to future stress or decline.

 

Where to Start: Rebalance Your Weakest Position

 

Now comes the most important question. What can you do right now, in the shortest amount of time, to see the best results?

 

Pick the one lever that is the weakest position in your portfolio, and work on it for two weeks.

 

If it is sleep, look for the underlying causes and make fixing it a priority. You really do not want insomnia quietly shrinking your brain and compounding over time in a way that could raise your risk for Alzheimer’s disease.

 

If it is stress, build a system to reduce it by ten percent over the next two weeks. Make a list of what matters most in your life, and eliminate one or two responsibilities that matter least. You are a smart person; figure out what needs to change so you can have some calm, relaxing time in your day. Try breathing slowly for two minutes, without interruption, at least once a day. Do it when you feel overwhelmed, or right before you fall asleep.

 

What Happened to the Hedge Fund Manager

 

Let me return to my patient for a moment.

 

Once I walked him through what was actually driving his brain changes, he had a genuine aha moment. He decided to cut back on his hours. He realized that his family and his own life mattered more to him than getting promoted at an accelerated pace. That one shift changed everything.

 

After six weeks of working on all five pillars of brain health, he was calmer, happier, and sharper. In fact, he stopped worrying about Alzheimer’s disease altogether.

 

Your Brain Is the Asset Everything Else Depends On

 

Here is what I want you to take from this.

 

Your brain is the one asset that every other asset in your life depends on. Everything else you optimize sits downstream of it. Start managing your brain like the highest ROI investment you have, and you will notice the difference within weeks, not years.

 

I believe what separates a good leader from a great leader is how they care for their company and their people while also caring for themselves and their own brains. Sacrificing your wellbeing to drive company revenue takes a toll on brain vitality and accelerates decline in the prefrontal cortex and hippocampus, the very regions essential for making decisions under pressure, and for memory and learning.

 

Build the five pillars into your daily routine as much as you can, and you will notice a clear improvement in your brain function within weeks.

 

Dr. Majid Fotuhi is a Harvard- and Johns Hopkins-trained neurologist, bestselling author of The Invincible Brain (USA TODAY Bestseller), and one of the world’s leading experts on brain health and cognitive performance. He has spent more than three decades studying the brain’s capacity for growth and repair. To discover your brain health score and receive a personalized 10-page report, take the free Invincible Brain Assessment at invincible.drfotuhi.com.

 

📺 Watch the full video on Dr. Fotuhi’s YouTube Channel.

 

Keep up with Dr. Fotuhi on LinkedIn & Instagram.

Here is something surprising about the link between your knees and your brain: the same five habits that keep your knees from wearing out are the ones that keep your brain from wearing out.

 

But here is the part that surprised even me, after forty years in neurology. Knee pain that goes untreated does not stay in the knee. It can quietly trigger the start of accelerated brain aging. Pain leads you to slow down, and inactivity speeds up cognitive decline faster than almost anything else.

 

That chain reaction from a sore knee to a fading brain is what I want to walk you through. And I am going to show you exactly how to stop it and reverse it, so you can become more mobile and regain your brain vitality at the same time.

 

Different Tissue, Same Fire

 

Why would your knees and your brain care about the same things? Because they share the same enemy: chronic, low-grade inflammation.

 

In your joints, that inflammation breaks down cartilage. In your brain, that same inflammatory process contributes to significant atrophy and cognitive decline. Different tissue, same fire.

 

This is the key insight, and it changes how you should think about your health. The habits that put out the inflammatory fire don’t protect one organ or the other. They protect both at the same time.

 

The Five Pillars for Your Knees and Your Brain

 

Let me walk you through the five pillars that are essential for your knees and your brain, whether your joints are perfectly healthy or already hurting.

 

Pillar one: Exercise: Movement nourishes your cartilage and increases blood flow to your brain. Aim for 3,000 to 7,000 steps a day. That is just walking, not a serious workout. If you have the time, add some vigorous exercise for about three hours a week.

 

Pillar two: Diet: Eat fatty fish like salmon or sardines twice a week. Snack on fruit, such as a cup of blueberries. Avoid junk food, cook at home as much as possible, and use extra virgin olive oil instead of other oils. You can also take an omega-3 supplement with DHA and EPA at a dose of 1,000 mg a day. Curcumin is another great anti-inflammatory supplement worth trying. These food choices calm inflammation in your joints and your brain at once.

 

Pillar three: Sleep: Sleep seven to eight hours, and pay attention to when you go to bed, not just how long you sleep. Late, irregular sleep raises joint inflammation and disrupts your brain’s overnight clean-up process.

 

Pillar four: Weight and Metabolic health: Even a modest amount of weight loss meaningfully reduces the inflammatory load on both your joints and your brain. You do not need to lose a lot to feel a real difference.

 

Pillar five: stress reduction: A daily five-to-ten-minute practice of meditation or slow, deliberate breathing lowers the same inflammatory markers that damage cartilage and neurons alike.

 

Five daily habits. Two organs protected at once.

 

The Trap That Catches So Many People

 

Now I want to speak directly to anyone who has untreated knee osteoarthritis, because this is the moment that decides everything.

When your knee hurts, every instinct tells you to protect it by moving less. I understand that instinct. But moving less is exactly how you fall into a trap of accelerated cognitive decline. A slow, sedentary lifestyle leads to brain atrophy and a rapid decline in thinking and memory.

 

I have watched this happen to patients again and again. And I have also watched it reverse. Let me tell you about two of them.

 

Janet: When Treating the Knee Treated the Brain

 

I remember a patient of mine named Janet vividly. A retired teacher, she was 69 when she came to see me, worried about developing Alzheimer’s disease.

 

During our conversation, she mentioned in passing that she had significant pain in her left knee. As a result, she had stopped going to her pickleball games. She had also quietly withdrawn from other activities she used to love, like dancing.

 

I referred her to a physical therapist, who put her on a knee strengthening and stabilization program. She did it religiously, every day, for three months.

 

The woman who came back to see me was not just walking better. Janet was animated again, and she felt sharper. Most of her sense of cognitive decline had come from her sedentary life and her social isolation. Treating her knee pain, in a very real sense, treated her brain.

 

Jack: A Conversation About the Brain, Not the Knee

 

Another patient, Jack, was a 75-year-old accountant. He came to see me worried about “losing his marbles.”

 

As we talked about his overall health, I learned that he had lived with severe knee arthritis for years. Slowly, he had pulled back from his friends, his hobbies, the life he used to have. His sedentary lifestyle had led to gaining thirty pounds. His mood had darkened, and his memory was slipping.

 

He had tried physical therapy, but the pain persisted. His knee MRI showed advanced arthritis, and his surgeon recommended a knee replacement. But Jack refused. He wanted nothing to do with surgery.

 

So we talked- not about his knee, but about his brain. About how movement protects against cognitive decline, and how staying sedentary was quietly raising his risk of Alzheimer’s. That conversation changed his mind, and he agreed to the surgery.

Three months later, Jack was walking two to three miles a day. He was happier. He was sharper. And he told me, with real excitement in his voice, that he felt like he was starting an entirely new chapter of his life.

 

Don’t Let Pain Shrink Your Life

 

I share these two stories because they are not the exception. They are what happens when you refuse to let joint pain shrink your life.

 

Treat it aggressively. Set a goal to stay strong and active, not just to manage pain quietly in the background. Do not let anything stand between you and an active lifestyle.

 

Protecting your knees is not separate from protecting your brain. They both need the same five things: exercise, anti-inflammatory foods like a Mediterranean diet, adequate sleep, a healthy weight, and a calm mind.

 

And if your knees are already hurting, do not let that pain become the quiet beginning of accelerated aging. Strengthen them, treat them seriously, and stay in the life you have built.

 

 

Dr. Majid Fotuhi is a Harvard- and Johns Hopkins-trained neurologist, bestselling author of The Invincible Brain (USA TODAY Bestseller), and one of the world’s leading experts on brain health and cognitive performance. He has spent more than three decades studying the brain’s capacity for growth and repair. To discover your brain health score and receive a personalized 10-page report, take the free Invincible Brain Assessment at invincible.drfotuhi.com.

 

📺 Watch the full video on Dr. Fotuhi’s YouTube Channel.

 

Keep up with Dr. Fotuhi on LinkedIn & Instagram.

What you do in the first hour after you wake up matters more for your brain than anything else you do all day.

 

I know that sounds like a big claim. But once you understand what’s happening inside your head first thing in the morning, I think you’ll agree, and you’ll want to treat that hour differently starting tomorrow.

 

Let me explain the science, and then walk you through the exact four-step routine I recommend.

 

Why the First Hour Matters So Much

 

While you sleep, your brain runs a kind of cleanup crew called the glymphatic system. It flushes out the cellular waste your neurons produce throughout the day. So the moment you wake up, your brain is at its cleanest and most primed state.

 

That’s exactly why the first hour of your day carries so much weight. Your brain doesn’t just react to your day; it helps create it. What you feed it in those early minutes, in thoughts and in actions, sets the tone for everything that follows.

 

Here’s how I recommend using that hour, step by step.

 

Step 1: Don’t Rush Out of Bed

 

When you open your eyes, resist the urge to jump up, and whatever you do, don’t reach for your phone yet.

 

Instead, take a few minutes to think through your life. I like to focus on three sets of thoughts.

 

First, reconnect with your passions and your long-term goals. Visualize the life you’re working toward and the things that bring you the most joy.

 

Second, remind yourself that you’re capable of far more than you give yourself credit for. Most of the people you admire got where they are through effort, not luck. You can achieve any goal you set for yourself.

 

Third, tell yourself that things today will work out in your favor. Picture having a great day. And remind yourself that even when setbacks happen, they often become the first step toward something better.

 

A couple of minutes of this is enough to shift your whole mindset before your feet even touch the floor.

 

Step 2: Breathe and Feel Grateful

 

Still in bed, spend about five minutes on slow breathing or a short meditation.

 

Use this time to think about all the wonderful things you already have in your life. As you take each deep breath, remind yourself how fortunate you truly are. This isn’t about ignoring your challenges. It’s about setting the emotional tone of your day with energy and enthusiasm instead of stress and rush.

 

This step matters more than it might seem, and here’s why.

 

Chronically high levels of the stress hormone cortisol are toxic to your brain. When cortisol stays elevated day after day, it acts almost like a slow poison to the hippocampus, the part of your brain responsible for learning and memory, and the very region that shrinks first in Alzheimer’s disease.

 

A few minutes of gratitude and calm breathing is one of the simplest ways to keep that stress response in check. You are, quite literally, protecting the part of your brain you rely on to stay sharp and remember your life.

 

Step 3: Get Up and Move

 

By now you’ve spent about seven minutes still in bed, and your mind is already in a good place. Now it’s time to actually get up and move.

 

If you can, do some exercise or yoga every morning. A short run, a bike ride, a swim, or a simple stretching routine gets your neurons firing even if it’s only for 10 to 15 minutes.

 

If morning exercise isn’t possible for you, use this time for your daily family routines instead, like getting the kids ready for school. Either way, you’re moving your body and your mind into the rhythm of the day. Consistency matters far more here than intensity.

 

And if you need to check your emails or messages, this is the time. But don’t waste any of your precious morning on social media.

 

There’s real evidence behind the exercise piece specifically. A 2024 study found that twelve weeks of exercise was associated with significant changes in the hippocampus and improved neuroplasticity, your brain’s ability to learn and adapt. Your muscles aren’t the only thing that gets larger and stronger when you exercise. Your brain does too.

 

Step 4: Fuel Your Brain

 

Once you’ve moved your body or handled your morning chores, it’s time to eat.

 

An ideal breakfast for a sharper brain is built around protein and fiber, with coffee or tea if you like. You can alternate through the week so it never gets boring. One morning, try an omelet with vegetables and a slice of whole-grain toast. Another, oatmeal with blueberries and milk.

 

Rotate in nuts, berries, olive oil, leafy greens, poultry, or fish when you can. These are staples of the Mediterranean diet, which research shows can slow cognitive decline.

 

None of this requires a complicated meal plan. It just takes a little intention before you walk out the door.

 

The Bigger Picture: You Can Shape Your Brain

 

Having gone through a series of rejuvenating thoughts, some movement, and a healthy breakfast, you head out the door full of energy, ready to take on the world.

 

Here’s what I most want you to remember. Neuroplasticity is the most remarkable property of the human brain. It means you are not stuck with the brain you have today. You can actively shape and strengthen it, improving both how you experience life right now and how sharp you stay decades from now.

 

The morning is the single best window each day to prime your brain for the highest levels of neuroplasticity. And the routine itself is not complicated:

 

Warm up your mind with positive thoughts for two minutes. Add five minutes of deep breathing and gratitude. Move your body for 10 to 15 minutes. Finish with a high-protein, high-fiber breakfast. Then step out of the house full of positive thoughts and energy.

 

These four simple morning steps will help you have a great day today and stay sharp for years to come.

 

Dr. Majid Fotuhi is a Harvard- and Johns Hopkins-trained neurologist, bestselling author of The Invincible Brain (USA TODAY Bestseller), and one of the world’s leading experts on brain health and cognitive performance. He has spent more than three decades studying the brain’s capacity for growth and repair. To discover your brain health score and receive a personalized 10-page report, take the free Invincible Brain Assessment at invincible.drfotuhi.com.

 

📺 Watch the full video on Dr. Fotuhi’s YouTube Channel.

 

Keep up with Dr. Fotuhi on LinkedIn & Instagram.

What if I told you that eating a donut can do something to your brain that looks a lot like what cocaine does to it?

 

I know that sounds dramatic. But by the time you finish reading this, I think you’ll see it differently. Because the truth is that sugar isn’t just fattening, it’s actually toxic to your brain. Obesity can shrink your brain at any age. And the new class of weight-loss drugs everyone is talking about may be doing something in the brain that goes well beyond the number on the scale.

 

Let me walk you through what actually happens when you eat.

 

The Sugar Spike and the Crash That Follows

 

When you eat sugar, your blood glucose rises. Your pancreas responds by releasing insulin, a hormone that works like a key, unlocking your cells so glucose can get inside and be turned into energy.

 

The type of food matters enormously here. Complex carbohydrates like fruits and vegetables cause a slow, gentle rise in blood sugar. But a donut or a bowl of ice cream causes a sharp spike, which triggers a flood of insulin. That surge of insulin then pushes your blood sugar too low, and that crash is what leaves you hungry and craving sugar again an hour later.

 

Repeat that cycle day after day, and it often leads somewhere you don’t want to go: diabetes and obesity.

 

Three Ways This Cycle Quietly Damages Your Health

 

Over time, this pattern of sugar spikes and insulin surges causes three deeper problems.

 

First, your cells can become resistant to insulin. Sugar starts building up in your blood instead of getting inside your cells where it belongs. This is called insulin resistance, and it’s an early step toward metabolic syndrome and diabetes.

 

Second, excess sugar binds to proteins throughout your body in a process called glycation. Too much glycation impairs how those proteins function. This is part of why patients with poorly controlled diabetes can lose sensation in their toes, lose their vision, or damage their kidneys to the point of needing dialysis.

 

Third, high sugar levels generate free radicals and inflammation everywhere — throughout your body and inside your brain.

 

Why Sugar Is Toxic to Your Brain

 

This is where it gets personal for me as a neurologist.

 

In animal studies, high sugar levels reduce the number of dendrites, the branches on your neurons that receive connections from other neurons. Fewer connections mean less communication between brain cells, and that shows up in real life as brain fog and memory loss.

 

A high-sugar diet also reduces neurogenesis, the birth of new neurons in your hippocampus, which is your brain’s memory center. In other words, sugar makes it harder for your brain to build the very cells you rely on to learn and remember.

 

And in human studies, obesity is consistently linked to a smaller hippocampus and a higher risk of disease.

 

Brain Shrinkage Happens at Every Age

 

Here’s what surprises most people: this isn’t just a concern for older adults.

 

Brain atrophy linked to excess body fat shows up across every age group. Even children are not spared. When obesity affects a young brain, some of the academic struggles we see in kids may actually be tied to changes in the hippocampus and other brain regions.

 

There’s also a circulation piece to this story. In people with multiple risk factors, researchers have found lower blood flow throughout the brain, along with lower scores on memory and other brain functions. Less fuel reaching the brain means less capacity to think, focus, and remember.

 

Why We Eat and Why Willpower Isn’t the Whole Story

 

So why do we eat in the first place, and what actually controls our eating behavior?

 

Part of the answer is hormonal. Chemicals in your blood, leptin, insulin, and others, tell your brain when to stop eating, while ghrelin, the “hunger hormone,” tells your brain to eat more.

 

But eating isn’t only about hunger. Your brain’s reward system, the same circuitry involved in addiction, lights up when you eat, and especially when you eat sugar. Over time, this creates craving and tolerance. You crave sugar constantly, and you need more of it to feel the same satisfaction you once got from less.

 

Your prefrontal cortex is supposed to act as the brake on all of this, the part of your brain that helps you stop after the first bite. But in obesity, the prefrontal cortex doesn’t work as well, and your willpower around food shrinks along with it.

 

I want to be clear about what this means: eating too much is not simply a lack of discipline. For many people, it reflects a genuine addiction to food. That’s not an excuse; it’s a starting point for real solutions.

 

Where Ozempic Fits In

 

This brings us to the newest piece of the puzzle.

 

Medications like Ozempic work in three places at once. In the pancreas, they increase insulin and lower a hormone called glucagon. In the stomach, they slow digestion so you feel full faster and for longer. And in the brain, they reduce appetite directly, quieting the cravings that drive addictive eating.

 

Many patients on these drugs describe something fascinating: a quieting of what’s been called “food noise,” the constant mental chatter about food that runs in the background all day. Researchers are now studying whether these same medications might help with Alzheimer’s prevention, and even with addiction to alcohol, smoking, or other behaviors, since they appear to turn down the brain’s reward and addictive pathways.

 

But turning down the reward system isn’t free of trade-offs. Some patients report depression, fatigue, or even brain fog. This is still very much an active area of research, and I’ll be watching it closely.

 

What I Want You to Remember

 

Your brain is not separate from the food you eat. Every sugar spike and every extra pound leaves a mark on every organ in your body and on your brain.

 

If you want to stay sharp, the path is clear. Eat healthy food in reasonable portions. Exercise often. When you are fit, your brain simply works better.

 

People have known the essence of this for centuries: healthy body, healthy mind. What’s different now is that, for the first time, we have the scientific data to understand exactly how it works and how you can use that knowledge to take back control of your eating and protect your brain for decades to come.

 

Dr. Majid Fotuhi is a Harvard- and Johns Hopkins-trained neurologist, bestselling author of The Invincible Brain (USA TODAY Bestseller), and one of the world’s leading experts on brain health and cognitive performance. He has spent more than three decades studying the brain’s capacity for growth and repair. To discover your brain health score and receive a personalized 10-page report, take the free Invincible Brain Assessment at invincible.drfotuhi.com.

 

📺 Watch the full video on Dr. Fotuhi’s YouTube Channel.

 

Keep up with Dr. Fotuhi on LinkedIn & Instagram.

I want to talk to you about the single most important thing you can do for your brain.

 

In my work as a neurologist, I describe five pillars of brain health: fitness, sleep, nutrition, mindset, and brain training. Each of them matters. Each of them, done well, makes your brain measurably stronger. But they are not equal, and by far the most important pillar of brain health is exercise and fitness.

 

I know that “exercise is good for you” sounds like advice you have heard a thousand times. What most people have never heard is why, what actually happens inside your brain and your cells when you move your body. Once you understand the biology, exercise stops being a chore on your to-do list and becomes more like a superpower.

 

Let me walk you through it.

 

 

Tiny Factories Power Your Cells, and You Can Build More of Them

 

Inside every one of your cells are small structures called mitochondria. Think of them as tiny factories that generate ATP, the energy currency of your body. Everything you do requires ATP. Your brain runs on it. So does your heart, your kidneys, your muscles, your skin. Nothing in your body works without the energy these little factories produce.

 

Here is the part that should concern you: with aging, both the number and the function of your mitochondria decline with every decade of life. It is one of the quiet engines of aging, operating silently in the background, long before you feel any difference.

 

And here is the part that should excite you: exercise reverses that decline.

 

When you exercise, you increase the number of mitochondria inside your cells. More factories. More energy. More capacity in every organ of your body, including your brain. If you want to rejuvenate every cell in your body at the most fundamental level, this is how you do it. And the best way to build more mitochondria is to build your fitness stamina.

 

 

More Blood Vessels, More Oxygen, More Nutrition

 

The second thing exercise does is expand your brain’s supply lines.

 

Physical activity increases the number of capillaries, the small blood vessels that deliver blood throughout your brain, your retina, your skin, and every other organ. More vessels mean more blood flow. More blood flow means more oxygen and more nutrition reaching every cell in your body.

 

Your brain is one of the most metabolically demanding organs you have. It depends, moment to moment, on a rich and steady supply of oxygen and nutrients. When you exercise regularly, you are literally upgrading the infrastructure that feeds it.

 

 

Exercise Grows the Part of Your Brain That Remembers

 

The third effect is, to me, the most remarkable of all.

 

Deep inside your temporal lobe sits a structure roughly the size of your thumb called the hippocampus. It is the ground zero for learning and memory in your brain. And when you exercise, you increase the number of neurons and synapses inside your hippocampus.

 

Let that sink in. Physical movement, walking, swimming, dancing, and playing tennis, causes new brain cells and new connections to form in the exact region that determines how well you learn and remember.

 

The downstream benefits are exactly what you would expect. People who exercise have a larger hippocampus and a larger cortex. They have better memory. They sleep better and enjoy a better mood. They are far less likely to develop Alzheimer’s disease decades later and less likely to suffer heart attacks and strokes along the way.

 

There are very few things in medicine I would call a no-brainer. Exercise is one of them.

 

 

The One Number That Predicts Your Brain’s Future

 

So what does it actually mean to be “fit”?

 

Fitness means stamina and endurance. How many flights of stairs can you climb? How far can you walk without stopping? These everyday questions point to something we can measure precisely, a number called VO2 max.

 

VO2 max is the total amount of oxygen your body can consume at peak exercise, usually measured in milliliters of oxygen per minute per kilogram of body weight. It is the gold-standard measure of cardiovascular fitness and endurance.

 

And it turns out to be far more than a fitness statistic. People with a higher VO2 max have more mitochondria in their cells, a bigger hippocampus, and a far lower likelihood of developing Alzheimer’s disease. It is a remarkable measurement, a single number that can tell you, today, what is likely to happen to your brain in the future.

 

You can measure your VO2 max precisely at a gym or a doctor’s office. But there are also simple ways to estimate it: walk one or two miles, then record your time, your heart rate, and your weight, and calculate your approximate VO2 max. I strongly recommend that you measure it and use that number as your baseline. What gets measured gets improved.

 

 

How to Build Your Fitness: The Right Way

 

If you have not been active, the path forward is simpler than you think. Here is what I tell my patients:

 

Start slowly. Do not go from nothing to a lot in one week. Begin with walking, and increase the amount of exercise you do on a weekly basis. Gradual, consistent progress is what builds mitochondria and what prevents injury and burnout.

 

Be persistent and win the first step. Some mornings, you will wake up and not feel like going for a walk. Do not negotiate with that feeling. Just get up and go. Once you have put your shoes on and stepped outside, the rest is easy. The first step is the difficult part; everything after it takes care of itself.

 

Find the exercise you actually like. If you don’t enjoy the gym, don’t go to the gym, go for a walk. If you don’t like running, play tennis. If you don’t like tennis, take dancing lessons. Do something you genuinely enjoy, because the best exercise is the one you will still be doing three months from now. Remember: the more active you are, the more mitochondria you generate.

 

 

My Prescription

 

Exercise is the most important thing you can do for your brain, and you need to do it every day.

 

My recommendation is simple: remain active every single day. Walk 5,000 steps or more as much as you can. Get at least three hours of real exercise each week, and make sure it is something you enjoy.

 

Do this consistently, and you will be doing the best possible service for your brain and your body. You will live longer. And you will stay sharp well into your 80s and 90s.

 

Dr. Majid Fotuhi is a Harvard- and Johns Hopkins-trained neurologist, bestselling author of The Invincible Brain (USA TODAY Bestseller), and one of the world’s leading experts on brain health and cognitive performance. He has spent more than three decades studying the brain’s capacity for growth and repair. To discover your brain health score and receive a personalized 10-page report, take the free Invincible Brain Assessment at invincible.drfotuhi.com.

 

📺 Watch the full video on Dr. Fotuhi’s YouTube Channel.

 

Keep up with Dr. Fotuhi on LinkedIn & Instagram.