The same brain health advice produced very different results

Most people already know the broad advice for protecting their brain. Exercise regularly. Eat well. Manage blood pressure and blood sugar. Stay socially and mentally engaged. Get enough sleep.

The harder part is following through consistently, especially when work gets busy, routines change, motivation fades, or the original plan does not fit your life very well.

A two-year randomized trial across eleven Latin American countries has now put a number on how much that harder part is worth. Both groups worked on the same broad areas of brain health. One group received ongoing coaching, supervision, and regular group meetings. The other received health education and general recommendations. After two years, the structured group showed 55 percent greater improvement in overall memory, thinking, and reasoning.

The trial, called LatAm-FINGERS, was published in The Lancet and presented at the Alzheimer's Association International Conference.

What the trial tested

The study included 1,065 older adults who were at elevated risk of cognitive decline but did not have dementia. It ran across twelve sites in eleven countries and followed participants for two years.

Both groups worked on the same broad areas of brain health, including physical activity, nutrition, cognitive training, social engagement, and management of cardiovascular risk. The difference was the amount of structure surrounding the work.

The flexible group, 526 participants, attended four meetings over two years. They received health education and general recommendations, but no ongoing coaching or supervision.

The structured group, 539 participants, received supervised exercise, nutrition counseling, cognitive training, cardiovascular risk monitoring, ongoing coaching, and 38 group meetings that provided social connection and accountability.

In other words, the trial was not testing whether lifestyle matters for the brain. That question has been asked before. It was testing how much the way a program is delivered can change the results it produces.

What happened

After two years, the structured group showed 55 percent greater improvement in overall memory, thinking, and reasoning than the more flexible group. They also had greater improvements in executive function and processing speed.

Both groups were working on their brain health, and both improved. The structured group simply improved much more.

That makes the finding more interesting than a comparison between doing something and doing nothing. The broad recommendations were similar. What changed was the frequency of contact, the level of supervision, and the support participants received while putting those recommendations into practice.

Because participants were randomly assigned to the two groups, differences in motivation or baseline health are less likely to explain the result. The structured program itself appears to have contributed to the additional cognitive improvement.

Heather Snyder of the Alzheimer's Association, commenting on the results at the conference, put it simply: "A key message from this study is that structure and social support matter."

The finding builds on the original FINGER trial in Finland, which found that a multidomain lifestyle program could help protect cognitive function in older adults at risk of decline. LatAm-FINGERS took that model and adapted it to local cultures, diets, and habits rather than importing it unchanged, which matters for anyone wondering whether these programs travel.

Read the full LatAm-FINGERS study

What structured support actually does

A brain health plan can look simple on paper and still be difficult to carry out.

A person may leave an appointment intending to exercise four times a week, improve their sleep, change their diet, take several supplements, and reduce stress. Every recommendation may be reasonable. The problem is that seven reasonable priorities are still seven priorities competing with the rest of life.

A few weeks later, the easiest habits are sometimes still happening. The more inconvenient ones have started to disappear, which is where structured support comes into play. It creates a regular opportunity to review what happened, understand why something did not work, and adjust the action plan before one missed week becomes a habit that has quietly been abandoned.

Sometimes the person needs accountability. Sometimes the goal was too ambitious. Sometimes the recommendation needs to change because of travel, an injury, family responsibilities, or a demanding period at work.

The goal is not to follow the original plan perfectly. It is to keep adjusting the plan until it works in real life.

The question the study leaves open

LatAm-FINGERS compared a structured, intensive program with a more flexible, self-guided version focused on the same broad areas of brain health. It did not test whether a personalized action plan works better than a generic one. That is a separate question, and an important one.

Two people can receive the same list of brain health recommendations and have very different needs. One person may need to focus on blood pressure. Another may need to address poor sleep, low cardiovascular fitness, insulin resistance, or a nutritional deficiency first. The markers that shape brain health sit across sleep, metabolic health, cardiovascular health, inflammation, and nutrition, and they do not line up the same way in any two people.

A useful brain health system needs to answer two questions. What matters most for this person, and what will help them keep doing it?

Personalization helps determine the priorities. Structure helps turn those priorities into sustained action.

How BetterBrain approaches both

BetterBrain is one connected system that brings together brain-relevant health information, a personalized action plan, and continued support.

There are two ways to start.

Some people begin with Blueprint, which uses more than 50 brain-relevant biomarkers, cognitive testing, health history, and lifestyle information to identify the areas that matter most for their brain health, with a nurse coach to walk through what the results mean. Instead of receiving a broad list of everything they could improve, they get a personalized action plan ranked by impact.

Others begin with the Coaching Program, where a dedicated brain health coach helps build the action plan, checks in on progress, and adjusts it when life gets in the way. Coaching is often fully covered by insurance, and many commercially insured clients pay nothing out of pocket.

Both starting points lead toward the same goal: a smaller set of meaningful priorities, a realistic action plan, and enough continued support for that plan to last.

The bottom line

The LatAm-FINGERS trial moves the brain health conversation beyond whether lifestyle matters. It shows that the way lifestyle guidance is delivered can meaningfully change the outcome.

Advice alone leaves people responsible for setting priorities, creating a schedule, tracking progress, solving barriers, and knowing when to adjust the plan. A better delivery system does those things with them. It provides clear priorities, regular contact, accountability, opportunities to review progress, and a way to adapt when the original plan stops working. That support helps healthy actions continue long enough to produce meaningful results.

Personalization helps you choose the right actions. Structure helps you keep doing them.

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Start your brain health journey

Our Chief Science Officer, Dr. Tommy Wood, joined Andrew Huberman on the Huberman Lab podcast for a nearly three-hour conversation titled "Accelerate Learning & Increase Cognitive Capacity." His core message: your brain keeps adapting to whatever you ask of it, at 40 and at 75. Staying sharp is less about your age and more about whether you keep giving your brain new, challenging inputs, move your body before and around mental work, eat a high-quality overall diet, and test your biomarkers instead of guessing at supplements.

Here are the six takeaways we think are most worth acting on, plus where to start if you want to put them into practice.

Does aging itself cause cognitive decline?

Not in the way most people assume. According to Wood, aging itself is not the primary driver of decline. Your brain keeps the capacities you use and prunes the ones you stop using, so much of what we call age-related decline comes from no longer giving the brain new, challenging inputs. Encouragingly, he notes that mental processing speed tends to hold steady until around age 60.

That reframing matters. If decline is largely about disuse rather than age, then the inputs you choose, at any age, are levers you control.

What activities actually keep your brain sharp?

The activities that build cognitive capacity share three traits: they are new, hard, and ideally social.

Crosswords and sudoku, Wood points out, are more relaxing than challenging. They exercise skills you already have. To actually build capacity, pick something that stretches you and mixes movement, thinking, and other people:

• Dancing has the best evidence, ballroom and square dancing especially
• Ball sports and martial arts
• Learning a language

Part of the trick is getting comfortable being a beginner. The discomfort of making mistakes is not a sign you picked the wrong activity. It is what drives the learning.

Do you need to be in a flow state to learn?

No. Real learning, and even peak performance, often happens in what athletes call a clutch state, where the work still feels like hard work.

What matters more is structure. Hard mental work is really only sustainable in 20 to 30 minute focused blocks, so work in chunks and protect them from distraction. Even having a phone in the room carries a cost to focus.

How does exercise improve learning and memory?

Wood describes exercise as two brain tools in one:

1. In the moment: a short 20 to 30 minute jog or strength session right before mental work sharpens learning during that session.
2. Over time: harder aerobic work, like intervals, builds the hippocampus and supports memory, while resistance training builds the brain's white matter and supports decision-making.

The practical answer to "cardio or weights for brain health?" is both, and if you can, schedule some of it right before your most demanding mental work.

What should you eat, and should you take supplements?

On diet, whole-food patterns like the Mediterranean and MIND diets have the best evidence, and it is overall diet quality, not any single food, that matters.

On supplements, Wood's advice is to test your levels rather than guess, because the standard "normal" lab range is not the same as the optimal one. His clearest example: omega-3 and B vitamins only work when you have both. That interdependence is exactly why we measure homocysteine and other brain-specific biomarkers in Blueprint rather than blanket-recommending a supplement stack.

For supplements with modest, real support, he points to creatine and a basic omega-3 plus B-vitamin stack. Our picks in those categories, including Advanced DHA, Thorne Creatine, and MethylAssist, are all in the Picks library, and Picks is now HSA/FSA eligible through our partnership with TrueMed.

What else protects long-term brain health?

Some of the biggest protections are indirect. Blood pressure, cholesterol, hearing, and metabolic health all shape long-term brain health. Avoiding serious illness matters too, because cognition tends to step down after a major sickness rather than declining smoothly.

One finding Wood flags as worth watching: the shingles vaccine has been associated with lower dementia risk across several large studies.

Where to start

You do not need a perfect routine or new technology. The conversation points to a short list: work on something hard and a little new, move before mental work, get real sleep, and test before you supplement.

That last step is where BetterBrain can help. Blueprint covers the testing, 50+ biomarkers plus cognitive testing and a 1:1 consultation to walk through your results, for $89 with insurance. And if you finish your results thinking "okay, but what should I actually do," that is what our 12-week Coaching Program is for. 92% of eligible customers pay $0 with insurance.

If you want to go deeper, listen to the full episode, and check out Tommy's new book, The Stimulated Mind: Future-Proof Your Brain from Dementia and Stay Sharp at Any Age, which covers the same ground in more depth through his 3-S model: challenge the brain, feed it, and let it recover.

Frequently asked questions

At what age does cognitive decline start?

Later than most people think. Wood notes that mental processing speed tends to hold steady until around age 60, and that much of what we attribute to aging actually reflects reduced challenge. The brain keeps what you use and prunes what you stop using, at any age.

Are crosswords and sudoku enough to keep your brain sharp?

Probably not. Wood describes them as more relaxing than challenging, since they exercise skills you already have. To build new capacity, choose activities that are new, hard, and social, like dancing, ball sports, martial arts, or learning a language.

What is the best exercise for brain health?

Both aerobic and resistance training, for different reasons. Harder aerobic work like intervals builds the hippocampus and supports memory, while resistance training builds white matter and supports decision-making. A 20 to 30 minute session right before mental work also sharpens learning in the moment.

Should I take supplements for brain health?

Test first. Standard "normal" lab ranges are not the same as optimal ranges, and some nutrients depend on each other. Omega-3 and B vitamins, for example, only work when you have both, which is why measuring biomarkers like homocysteine beats guessing. Creatine and a basic omega-3 plus B-vitamin stack have modest, real evidence behind them.

Hey there,

There's a lot of brain health advice on the internet, and most of it comes with the same problem: no way to tell where it came from or if it's trustworthy. Someone tells you sauna is good for your brain, or that you should be lifting, or that omega-3s matter, and you're left to either take it on faith or go digging through PubMed yourself. Most people, reasonably, just take it on faith.

We've never loved that, because trust in health advice should be earned, not assumed. So we did two things worth telling you about.

The Content Library

First, if you haven't spent time in the Content Library inside your dashboard, it's worth a look. It's a growing, curated collection of the best brain health content we can find: videos, podcasts, articles, and clips, pulled from people who actually know what they're talking about. Think Andrew Huberman on light and sleep, Rhonda Patrick on sauna and exercise, our own CSO Tommy Wood on reducing cognitive decline, and a lot more.

You can search it, filter by format, and save what you want to come back to. And BeBe can point you to the right thing for wherever you are: if you ask about sleep, it can hand you the specific episode worth your time instead of making you wade through everything. It's the difference between a search engine and a good friend who's already done the reading. If you're not a BetterBrain client yet, you can access the Content Library for free with a Self-Directed account.

Technique Spotlight

The studies behind your plan

This is the part we're most excited about. Every technique and recommendation in your BetterBrain plan is now linked to the actual research behind it, the specific studies connected to the specific practice, biomarker, or system they support. When BeBe or your coach suggests something, you can trace it straight to the evidence and see how strong it is.

This was a big project and it brings roughly 1,500 studies into the app, mapped to the techniques and markers they relate to. Weak or unsupported studies were deliberately left out, so what's linked is the evidence we'd actually stand behind. 

Here's why that matters. Not every recommendation carries the same weight. Some are backed by large randomized trials, others by smaller or observational work, and you deserve to know which is which.  Linking the studies keeps us accountable to the evidence and lets you make informed decisions instead of just following instructions. It's the same standard we hold ourselves to internally: when a new study comes out, we read it, assess it, and only fold it into what we recommend if it holds up.

How this relates to brain health

Brain health is a field with real science and a lot of noise, and the two are easy to confuse. We try to stay on the science side of that line and be honest about what's solid, what's promising, and what's still an open question. Making the research visible is that principle made concrete. If we recommend it, you should be able to check it.

If you want to explore, open a technique and scroll to the bottom to see the relevant studies or ask BeBe why it recommends any technique in your plan, and follow the research yourself.

And if you're reading this as someone who hasn't started with us yet: this is what BetterBrain is, evidence-based brain health guidance you can verify, not wellness advice you have to trust blindly. BetterBrain coaching is covered at $0 for 92% of approved clients. See if you're covered.

Know someone who might benefit from BetterBrain?

Share this referral link and they'll get Essentials labs (50+ biomarkers) for just $39 (normally $89), plus access to $0 coaching with insurance.

There's a lot of brain health advice on the internet, and most of it comes with the same problem: no way to tell where it came from or whether it's trustworthy.

Someone tells you sauna is good for your brain. Or that you should be lifting. Or that omega-3s matter. And you're left to either take it on faith or go digging through PubMed yourself. Most people, reasonably, just take it on faith.

We've never loved that. Trust in health advice should be earned, not assumed. So we did two things worth telling you about.

The Content Library: curated, not crowdsourced

If you haven't spent time in the Content Library inside your dashboard, it's worth a look. It's a growing, curated collection of the best brain health content we can find: videos, podcasts, articles, and clips from people who actually know what they're talking about.

Think Andrew Huberman on light and sleep. Rhonda Patrick on sauna and exercise. Our own Chief Science Officer, Dr. Tommy Wood, on reducing cognitive decline. And a lot more.

You can search it, filter by format, and save what you want to come back to. And BeBe, our AI assistant, can point you to the right thing for wherever you are. Ask about sleep, and it hands you the specific episode worth your time instead of making you wade through everything. It's the difference between a search engine and a good friend who's already done the reading.

Not a BetterBrain client yet? You can access the Content Library for free with a Self-Directed account.

The studies behind your plan

This is the part we're most excited about.

Every technique and recommendation in your BetterBrain plan is now linked to the actual research behind it: the specific studies connected to the specific practice, biomarker, or body system they support. When BeBe or your coach suggests something, you can trace it straight to the evidence and see how strong it is.

This was a big project. It brings roughly 1,500 studies into the app, each mapped to the techniques and markers it relates to. Weak or unsupported studies were deliberately left out, so what's linked is the evidence we'd actually stand behind.

Why evidence strength matters

Not every recommendation carries the same weight. Some are backed by large randomized controlled trials. Others rest on smaller or observational work. You deserve to know which is which.

Linking the studies does two things. It keeps us accountable to the evidence. And it lets you make informed decisions instead of just following instructions.

It's the same standard we hold ourselves to internally: when a new study comes out, we read it, assess it, and only fold it into what we recommend if it holds up.

Why this fits how we think about brain health

Brain health is a field with real science and a lot of noise, and the two are easy to confuse. We try to stay on the science side of that line and be honest about what's solid, what's promising, and what's still an open question.

Making the research visible is that principle made concrete. If we recommend it, you should be able to check it.

How to explore

Open any technique in your plan and scroll to the bottom to see the relevant studies. Or ask BeBe why it recommends any technique in your plan, and follow the research yourself.

And if you're reading this as someone who hasn't started with us yet: this is what BetterBrain is. Evidence-based guidance to sharpen your brain health now and reduce dementia risk long-term, backed by research you can verify rather than wellness advice you have to trust blindly. BetterBrain coaching is covered at $0 for 92% of approved clients. See if you're covered.

Bottom line

The Content Library puts the best brain health content in one curated place. And every technique in your plan is now linked to the real research behind it.

Trust in health advice should be earned. Now you can check ours.

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Chronic stress does more than affect your mood. Sustained cortisol exposure physically shrinks the hippocampus, your brain's primary memory center. The encouraging part: this is reversible. In controlled neuroimaging studies, eight weeks of mindfulness practice increased gray matter in the hippocampus and reduced it in the amygdala, the brain's threat-detection center. Managing stress is one of the most accessible ways to protect your long-term cognitive health.

Stress is easy to file under "quality of life" rather than "brain health." The neuroscience tells a different story, and it's a hopeful one, because the same biology that makes chronic stress harmful also makes it one of the most modifiable risks you can act on.

Below, we cover what chronic stress does to the brain, the landmark study showing mindfulness can reverse it, the techniques that actually work, and how to measure your progress.

What does chronic stress do to your brain?

When your brain perceives a threat, it releases cortisol. In short bursts, this is helpful, it sharpens your response to a genuine challenge. The problem is sustained elevation.

Under chronic stress, prolonged cortisol exposure becomes toxic to neurons, and the hippocampus is especially vulnerable because it is packed with cortisol receptors. Over time, that exposure causes the neural branches that let brain cells communicate to shrink. The downstream effects are measurable: reduced hippocampal volume, fewer new brain cells, and impaired memory.

This matters beyond day-to-day forgetfulness. Hippocampal shrinkage is one of the earliest detectable structural changes in Alzheimer's progression, and chronic psychological stress is now recognized as a modifiable dementia risk factor in its own right. In other words, stress sits on the same biological pathway as accelerated cognitive aging, which is precisely why acting on it has such a high return.

Can mindfulness reverse stress-related brain changes?

Yes, and the evidence comes from before-and-after brain imaging, not self-report.

In 2011, researchers at Harvard-affiliated Massachusetts General Hospital published a landmark neuroimaging study. Using MRI, they measured gray matter density in healthy adults before and after eight weeks of mindfulness practice. Participants showed measurable increases in gray matter in the hippocampus and in regions involved in learning and emotional regulation. At the same time, gray matter in the amygdala, the brain's primary stress and threat-detection center, decreased. A control group who did not practice mindfulness showed none of these changes.

The design is what makes it compelling. This was not a comparison of lifelong meditators against non-meditators, where genetics or lifestyle could explain the difference. It was imaging of the same brains, across just eight weeks of practice. You can read the full study here.

How does stress management protect the brain?

Mindfulness and related practices work through a few overlapping mechanisms. They reduce cortisol output, calm the amygdala's threat response, and lower the chronic, low-grade inflammation associated with sustained stress. These are the same pathways implicated in accelerated cognitive aging, so quieting them protects the brain on more than one front at once.

The practical implication is freeing: you do not need the "perfect" technique. You need to move these levers consistently, and there is more than one way to do that.

What stress management techniques actually work?

Different techniques reach the same biology through different doors, which means you have options. These are the Essential, evidence-based interventions to start with:

• Slow, deep breathing. Controlled breathing activates your parasympathetic nervous system, your body's "rest and digest" mode. Even a few minutes measurably reduces cortisol and heart rate. For many people this is the easiest entry point.
• Mindfulness meditation. The technique behind the brain-imaging study above. Consistent practice, even 8 to 10 minutes daily, produces measurable effects on stress hormones and self-reported stress within a few weeks.
• Nature exposure. Time in natural environments is associated with lower cortisol, lower blood pressure, and improved mood. The effect appears to be dose-dependent, so more time outdoors tends to help more.
• Social support. Strong social connections help buffer the brain against the effects of stress.

How do you start a 10-minute mindfulness practice?

You do not need a cushion, an app, or a quiet mind. Here is the whole practice:

Find a quiet spot and sit comfortably. Bring your attention to the physical sensation of your breath, the air moving in and out. Your mind will wander. That is not failure, that is the exercise. Each time you notice it drifting and bring it back, you are doing the rep that builds the skill. There is no perfect posture and no requirement to empty your mind. Just ten minutes of practicing the return.

A note on getting started: Don't overthink which technique to begin with. If sitting meditation feels like a stretch, start with a few minutes of slow breathing or a walk outside. The research is clear on this point: the technique that protects your brain is the one you will actually do.

How can you track stress and its effects on the brain?

You can't feel your inflammation dropping, but you can measure it. Chronic stress shows up in bloodwork as elevated hs-CRP, one of the same inflammatory markers associated with cognitive decline. When a stress-management practice starts working, that number moves, and lab panels let you watch it happen.

The effects ripple outward from there. Sleep quality typically improves within weeks of consistent practice, and better sleep gives your glymphatic system, your brain's overnight waste-clearance crew, more time to do its job.

This is what makes stress management such a high-leverage intervention. It rarely works alone. Better stress regulation improves your sleep, better sleep amplifies the benefits of exercise, and lower inflammation makes anti-inflammatory nutrition work harder. Pull one lever, and the whole system responds.

The bottom line

Chronic stress physically changes the structure of your brain, and mindfulness and related practices can measurably change it back. You don't need to overhaul your life to benefit. Ten minutes of breathing or meditation, a walk outside, or time with people you care about all move the same biology. Start with whatever feels easiest, stay consistent, and let the results compound.

If you're working with a Brain Health Coach, the De-Stress section of your protocol is a natural starting point.

Ready to build a personalized stress management practice? Check if your insurance covers coaching.

Frequently asked questions

Does stress really shrink your brain?Yes. Sustained cortisol exposure from chronic stress is associated with reduced hippocampal volume, the brain region responsible for memory. It also reduces the formation of new brain cells and impairs memory over time.

Can you reverse brain changes caused by stress?Evidence suggests you can. In a 2011 MRI study, eight weeks of mindfulness practice increased gray matter in the hippocampus and decreased it in the amygdala in the same participants, changes not seen in a non-practicing control group.

How long does it take for mindfulness to change the brain?Structural changes were measurable after eight weeks of practice in controlled imaging studies, and effects on stress hormones and self-reported stress often appear within a few weeks.

What is the best stress management technique for brain health?There is no single best technique. Slow breathing, mindfulness meditation, nature exposure, and strong social connection all work through overlapping pathways. The most effective one is the one you will do consistently.

Is chronic stress a risk factor for dementia?Chronic psychological stress is now recognized as a modifiable dementia risk factor. Hippocampal shrinkage, which stress contributes to, is one of the earliest structural changes seen in Alzheimer's progression.

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A few reminders worth repeating

The fundamentals matter. Movement, sleep, nutrition, and social connection show up in the research again and again, and the earlier you start working on them, the more they compound.

But the fundamentals are just the starting point. Brain health is also deeply individual, and what moves the needle most for one person may not be what moves it for you. Depending on your biology, your genetics, your biomarkers, and your specific risk factors, the right plan might involve targeted supplementation, hormone or metabolic interventions, cardiovascular work, cognitive training, or addressing things like sleep apnea or inflammation. That's exactly why knowing your baseline matters so much. It turns a generic checklist into a plan built around you.

What our members are saying

"I put off getting tested for years because I figured there was nothing I could do. BetterBrain showed me exactly where I stood and gave me a plan. I wish I'd started sooner." — John O.

"Having a coach who actually checks in made all the difference. I've never been this consistent with my health." — Caroline T.

"Knowing my numbers took away the fear. Now it just feels like something I'm in control of." — Sandra W.

Consider this your friendly nudge

If brain health has been on your mind, this is a good month to act on it. Getting started is simple, much of it may be covered by insurance, and your future self will thank you.

And if you've already started on your BetterBrian journey consider forwarding this to a friend to help them take that next step.

Share this referral link and they'll get Essentials labs (50+ biomarkers) for just $39 (normally $89), plus access to $0 coaching with insurance.