How to Help Your Brain as You Age
Most advice about protecting your memory is a list of things you already know. Walk more. Eat better. Get some sleep.
What it rarely tells you is how much, which kind, or where to go when something needs attention.
This page is the version with the details filled in.
How Much of Memory Loss Can You Prevent?
In July 2026, the World Health Organization released updated guidance on protecting memory as we age. Their finding: up to 45% of dementia worldwide is linked to risk factors that can be changed.
That number is often misunderstood, so it is worth being clear.
It does not mean 45% of your personal risk is in your hands. And a diagnosis is never proof that someone failed to do the right things.
What it does mean is that the list below is the part you can work on.
What Kind of Exercise Protects Your Brain?
Almost every article on brain health says to stay active, then stops there.
That is where the advice falls short. Three kinds of exercise protect your brain, and each one works differently. Doing more of the kind you already enjoy does not cover the other two.
Walking Grows the Memory Part of Your Brain
Researchers at the University of Pittsburgh asked 120 older adults to walk around a track for 40 minutes, three days a week.
After one year, the walkers' hippocampus had grown about 2%. That is the seahorse-shaped part of the brain where new memories are formed. In the comparison group, it kept shrinking at the usual rate.
Two percent may not sound like much. It is worth about one to two years of normal age-related decline, earned with three walks a week.
What to aim for: 40 minutes, three times a week, at a pace where you can still talk but would rather not sing.
Why Strength Training Matters More Than You Think
Muscle rarely comes up in conversations about memory. It should.
In an Australian study, 100 adults who already had mild memory problems were randomly assigned to lift weights, do computer brain training, both, or neither. Nobody knew which group they were in.
The weights worked. The share of participants scoring in the normal range for thinking and memory doubled, from 24% to 48%. In the group doing pretend exercise, it barely moved.
A follow-up study found something even more interesting. The people whose muscles got stronger were the people whose thinking improved. The two went together.
There is a second reason to lift that has nothing to do with test scores.
Strength is what lets you carry your own groceries, get out of a low chair, and stay in your own home. You lose muscle steadily after midlife unless you work to keep it. Keeping it is much easier than rebuilding it.
What to aim for: twice a week, using the big movements. Push something, pull something, stand up from a seated position, carry something heavy. Heavy enough that the last repetition is genuinely hard. Resistance bands at your kitchen counter count.
Balance Training Protects Your Brain by Protecting Your Head
Head injury is one of the risk factors on the list. And in people over 65, the usual cause of a serious head injury is a fall from standing.
Balance training is not glamorous, but it works well. The Otago program is seventeen strength and balance exercises plus a walking routine, done three times a week at home. It is linked to roughly 35% fewer falls. Tai chi works about as well and suits people who would rather join a class.
Try This Before the Week Is Out
Sit in a dining chair and stand up without pushing off with your arms. Then do it over and over for thirty seconds and count how many you manage.
Another honest test: stand on one leg while you brush your teeth.
If you cannot get up without your arms, or the count worries you, that is real information and not a personal failing. Ask your doctor for a referral to physical therapy and use the words "falls risk assessment." It is a recognized referral and often covered. For a class instead of a clinic, your local Area Agency on Aging keeps lists of proven falls programs. Reach them through the Eldercare Locator at 800-677-1116 or eldercare.acl.gov.
What Should You Eat for Brain Health?
The MIND diet was created at Rush University Medical Center. It combines the Mediterranean and DASH eating patterns and leans toward foods linked to slower memory decline.
In practice that means leafy greens most days. Berries, nuts, beans, whole grains, fish, poultry, and olive oil as your main fat. Red meat, butter, cheese, pastries, and fried food stay occasional rather than forbidden.
Here is the part most articles leave out.
A long-term study followed older adults in Chicago and recorded what they already ate. Those whose meals most closely matched the MIND pattern developed Alzheimer's disease at a rate 53% lower than those whose meals matched it least. Moderate followers saw a rate about 35% lower.
But that study only watched. It could not separate the food from everything else that tends to go with it.
So researchers ran a stricter test. They assigned older adults with a family history of dementia to either the MIND diet or a slightly calorie-reduced diet, and followed them for three years. At the end, there was no meaningful difference in memory or brain scans between the groups. Both improved a little.
Read honestly, that is not a failure.
It means the MIND diet is a good way to eat that has not been shown to beat other good ways of eating. Which is a reason to follow it comfortably instead of anxiously.
Where to Start With Food
for three days, write down what you eat without changing anything. Then count. How many days included a leafy green? How many meals came out of a package?
You will learn more from that than from any quiz.
Then change one meal, not your whole life. Breakfast is the easiest to move. Oatmeal, berries, a few walnuts. While label reading isn't required for this diet, numerous MIND cookbooks are available for those who prefer following recipes.
One more thing about food. If you take a supplement specifically to protect your memory, and you have no diagnosed deficiency, current guidance does not support it. The overall pattern of eating is what carries the benefit. A capsule is not a pattern.
Do Brain Training Games Work?
Brain training apps reliably make you better at the games inside them.
Evidence that this carries over to daily life, or lowers dementia risk, is much weaker. The marketing has drawn regulators. In 2016, the makers of Lumosity settled with the Federal Trade Commission over ads claiming their games reduced memory decline.
What holds up better is real novelty and real difficulty. An instrument. A language. A class. Demanding work, complicated hobbies, serious reading.
The test is simple. Is it still hard after a month?
If it has become comfortable, it has stopped counting. That is your signal to change it, not proof that you finished.
What Health Problems Affect Memory?
Several items on the risk list are ordinary medical problems your doctor can address in one appointment. That is not true of most of this page, which makes these the highest-value things on it.
Hearing Loss
this is one of the largest single contributors on the entire list. It also makes company exhausting, which is one of the most common reasons people quietly stop going out. So it costs you twice.
The honest signs are social, not medical. Do you dread restaurants? Does your family say the television is too loud? Can you follow one voice but lose the thread when three people talk at once?
Following several voices at once is the first thing to go. It gets mistaken for a memory problem all the time, including by the person it is happening to.
Ask your doctor for a hearing test. Since October 2022, the FDA has allowed hearing aids to be sold over the counter to adults with mild to moderate hearing loss. No exam, no prescription, no audiologist needed. You can buy them at a pharmacy or online. If your loss is worse than mild, or one ear is much worse than the other, see an audiologist instead. Our page on hearing loss and memory goes into more detail.
Blood Pressure: The Cheapest Fix on This Page
High blood pressure is the most consistently supported item on the whole list, especially when treated in midlife. It has no symptoms, which is exactly why it goes untreated.
A home monitor costs less than a pair of shoes. Measure sitting down, arm supported, same time of day, twice a week. Then bring the readings to your doctor. More on blood pressure, cholesterol and memory.
Medications You May Not Suspect
Several common medications affect memory, and some are sold over the counter. Sleep aids with "PM" in the name, older allergy medicines, and bladder medications are all worth reviewing.
Put everything you take in a bag and ask your doctor or pharmacist for a review. Please do not stop anything on your own, because some medications are dangerous to stop suddenly. See medications that affect memory.
What to Ask For by Name
not everything that looks like memory loss is permanent. Sleep apnea, thyroid problems, low vitamin B12, and depression all cause genuine memory trouble, and all of them can be treated. Finding one of these is a much better outcome than a year of worrying.
For sleep apnea, the person who sleeps beside you is the best test available. Loud snoring, pauses in breathing, waking up tired after a full night.
Ask your doctor directly for a sleep study, a thyroid panel, and a B12 level. If low mood or lost interest has lasted more than a couple of weeks, say so at the same visit. In the United States, you can reach the Suicide and Crisis Lifeline any time by calling or texting 988. See when memory loss can be reversed.
How Much Sleep Do You Need?
For most adults, seven to nine hours.
The relationship looks more like a curve than a straight line. Both short sleep and unusually long sleep are linked to worse outcomes, though long sleep is more likely a signal of something else than a cause on its own.
A consistent wake-up time does more for your body clock than a consistent bedtime, and it is easier to control. Morning light outdoors beats any indoor lighting.
Why Does Staying Social Matter?
Infrequent social contact is on the list too. It is also the item that most resists being fixed by simply deciding to fix it.
Two things hold up over time.
A standing weekly commitment survives a low mood better than an open invitation does. And being useful to somebody wears better over the years than being visited.
If transportation is the barrier, solve that first. The Eldercare Locator at 800-677-1116 will find what exists near you.
How Do You Know Where You Stand Today?
All of this is easier to act on when you have something measured to act against.
Memory Exam is a 10 to 15 minute verbal assessment you can take at home. It cannot diagnose anything and it cannot tell you why something has changed.
What it can do is show whether your memory performance differs from what is expected for someone your age and background. Taken again later, it lets you compare against your own earlier result instead of a population average.
Memory Exam is a screening tool, not a diagnosis. Results should be discussed with a qualified doctor or healthcare professional when appropriate.
One Step Is Enough to Begin
you do not have to do everything on this page.
Pick the one item that felt most true when you read it. Book the hearing test. Buy the blood pressure cuff. Put two strength sessions in the calendar.
The best baseline is the one you take before you are worried. And paying attention to your own health, early and without panic, is a genuinely good place to begin.
Where This Information Comes From
- World Health Organization. Risk reduction of cognitive decline and dementia: WHO guidelines, second edition. July 2026.
- Livingston G, et al. Dementia prevention, intervention, and care: 2024 report of the Lancet standing Commission. The Lancet 2024.
- Erickson KI, Voss MW, Prakash RS, et al. Exercise training increases size of hippocampus and improves memory. Proceedings of the National Academy of Sciences 2011;108(7):3017-3022.
- Fiatarone Singh MA, Gates N, Saigal N, et al. The Study of Mental and Resistance Training (SMART) study. Journal of the American Medical Directors Association 2014;15(12):873-880.
- Mavros Y, Gates N, Wilson GC, et al. Mediation of cognitive function improvements by strength gains after resistance training in older adults with mild cognitive impairment. Journal of the American Geriatrics Society 2017;65(3):550-559.
- Morris MC, Tangney CC, Wang Y, et al. MIND diet associated with reduced incidence of Alzheimer's disease. Alzheimer's & Dementia 2015;11(9):1007-1014.
- Barnes LL, Dhana K, Liu X, et al. Trial of the MIND Diet for Prevention of Cognitive Decline in Older Persons. New England Journal of Medicine 2023;389:602-611.
- U.S. Food and Drug Administration. Over-the-counter hearing aids final rule, effective October 2022.
- Federal Trade Commission. Lumos Labs settlement, January 2016.