How to Lower Your Dementia Risk: 8 Everyday Habits That Protect Your Brain

Let us be honest from the start: there is no guaranteed way to avoid dementia. Age is the biggest risk factor, and it is not something we can change; genetics also plays a role. But that is far from the whole story, and the news is more encouraging than many people realize. A major 2024 analysis found that around 45 percent of dementia cases worldwide are linked to factors we can actually influence, and recent clinical trials show that changing everyday habits can help protect the brain.

This means that while you cannot eliminate your risk, you can meaningfully lower it and possibly delay the onset of memory problems, particularly if you start in midlife. It also means that developing dementia is never a personal failing, since much of the risk lies outside anyone’s control. What follows are eight everyday habits, grounded in the best current evidence, that support brain health, along with a clear-eyed look at what they can and cannot do.

Key Takeaways

• You cannot guarantee preventing dementia, because age and genetics, which we cannot change, are major factors.
• The 2024 Lancet Commission estimated that about 45 percent of dementia cases worldwide are linked to 14 modifiable risk factors across life.
• Recent randomized trials, including the FINGER study and the 2025 US POINTER trial, show that structured lifestyle changes can protect thinking and memory in older adults at risk.
• Hearing loss is the single largest modifiable risk factor, so protecting your hearing is one of the most impactful and underrated steps.
• What is good for your heart is good for your brain, so managing blood pressure, cholesterol, blood sugar, and weight matters a great deal.
• These habits lower risk and may delay onset. They are not a guarantee, and developing dementia is not a personal failing.

Can you really lower your risk of dementia?

It helps to be precise about what the science shows. In 2024, the Lancet Commission on dementia, an authoritative international review, concluded that roughly 45 percent of dementia cases worldwide could potentially be prevented or delayed by addressing 14 modifiable risk factors. That figure is a population-level estimate, meaning it describes what might be possible across whole societies if these factors were eliminated, not a promise that any individual can cut their personal risk by that much.

The other side of the coin matters too. More than half of dementia risk is not explained by these factors, and the strongest single risk factor, advancing age, cannot be changed, nor can your genes. So the honest framing is that these habits stack the odds in your favor and may push memory problems further into the future, not that they make you immune.

Encouragingly, this is not just theory. The Finnish FINGER trial in 2015 was a landmark study showing that a combined program of exercise, healthy diet, mental training, and managing heart-health risks helped protect thinking skills in older adults at risk. In 2025, the large US POINTER trial, involving more than 2,000 diverse older Americans, confirmed and extended this, finding that a structured lifestyle program protected cognition over two years, with the more intensive, supported version working best. These are among the strongest signs yet that everyday habits genuinely influence brain health.

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1. Move your body regularly

Physical activity is one of the most consistently supported habits for brain health, and it was a cornerstone of both the FINGER and US POINTER programs. Regular movement improves blood flow, supports heart health, and is associated with a lower risk of cognitive decline. You do not need to become an athlete. A mix of aerobic activity, like brisk walking, and some strength work, done consistently, is the goal. As with much of this list, the habit you can maintain for years matters more than the intensity of any single session.

2. Look after your heart numbers

A simple principle underlies much of dementia prevention: what is good for your heart is good for your brain. Several of the biggest modifiable risk factors are cardiovascular ones, including high blood pressure, high LDL cholesterol (added as a risk factor in 2024), diabetes, and obesity. Damage to blood vessels affects the brain as well as the heart.

That makes managing these numbers a genuine brain-health strategy: keeping blood pressure in a healthy range, addressing high cholesterol, managing blood sugar, and maintaining a healthy weight. Importantly, several of these require medical care and sometimes medication, not willpower alone, which is why regular check-ups are part of protecting your memory.

3. Protect your hearing, and check your vision

This is the habit most people overlook, yet hearing loss is the single largest modifiable risk factor for dementia in the Lancet analysis. The leading theory is that struggling to hear increases mental strain and reduces the social and cognitive stimulation that keeps the brain engaged. Encouragingly, studies have found that people with hearing loss who use hearing aids have a lower risk of cognitive decline and dementia.

The practical steps are straightforward: protect your hearing from loud noise, get your hearing tested if you suspect a problem, and use hearing aids if they are recommended rather than putting it off. Vision was added as a risk factor in 2024 as well, so getting regular eye tests and treating correctable vision problems is part of the same picture.

4. Keep learning and challenge your mind

Staying mentally engaged helps build what researchers call cognitive reserve, a kind of resilience that helps the brain cope with age-related changes. Higher education early in life is protective, but the benefit of mental stimulation continues throughout life. Learning a new skill or language, reading, playing a musical instrument, doing puzzles, or taking on mentally demanding hobbies all count. The key is genuine challenge and novelty rather than repeating things that have become easy, and combining mental with social activity, as the trials did, appears especially valuable.

5. Stay socially connected

Social isolation is a recognized risk factor for dementia, particularly later in life, and rich social connection appears to protect the brain. Meaningful interaction provides mental stimulation, supports mood, and is linked to better cognitive health. Staying in touch with friends and family, joining groups or classes, volunteering, or simply building regular social contact into your week are all worthwhile. This habit pairs naturally with staying mentally active and, for many people, with staying physically active too.

6. Eat a brain-friendly diet

Diet supports brain health mainly through the same channels as heart health. A Mediterranean-style diet, rich in vegetables, fruit, whole grains, legumes, fish, nuts, and olive oil, is associated with better cognitive health, and a variation designed for the brain, the MIND diet, was the eating pattern used in the successful US POINTER program.

A note of honesty here: when the MIND diet alone was tested in a three-year randomized trial, it did not clearly outperform a comparison diet, and both groups improved modestly. So rather than viewing any single diet as a magic shield, the sensible takeaway is that an overall healthy, plant-rich eating pattern supports brain and heart health and works best as part of a broader healthy lifestyle.

7. Prioritize good sleep

Sleep is increasingly recognized as important for brain health. Poor sleep and untreated sleep disorders such as sleep apnea are associated with a higher risk of cognitive problems, and sleep appears to help the brain clear waste products. It is worth noting that sleep is not among the 14 Lancet risk factors, partly because the cause-and-effect direction is still being untangled, since early brain changes can also disrupt sleep. Even so, aiming for consistent, sufficient, good-quality sleep, and getting sleep apnea evaluated and treated, is sound advice for your brain and the rest of your health.

8. Avoid smoking and limit alcohol

Two clear habits round out the list. Smoking is a modifiable risk factor for dementia, and stopping reduces risk at any age, alongside its many other health benefits. Excessive alcohol is also a recognized risk factor, so keeping alcohol within moderate limits, or lower, is better for your brain. Neither of these is about perfection, but both are meaningful levers within your control.

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A few more factors worth knowing

Beyond the eight habits, the Lancet Commission highlights a few more factors. Protecting your head from injury matters, since traumatic brain injury raises risk, so wearing helmets, using seatbelts, and preventing falls all help. Depression is a risk factor, so seeking treatment for persistent low mood supports brain health as well as wellbeing. And air pollution is linked to dementia risk, which is largely a matter for public policy but is worth being aware of where you can reduce exposure.

What to avoid

• Do not fall for supplements or “brain-boosting” products that claim to prevent dementia. No pill has been shown to do this, and the evidence points to lifestyle and medical risk-factor management instead.
• Do not assume the outcome is guaranteed in either direction. Healthy habits lower risk but do not make you immune, and some people with risk factors never develop dementia.
• Do not blame yourself or others. Dementia has many causes, including age and genetics, and developing it is not a moral or personal failing.
• Do not ignore treatable risk factors like high blood pressure, cholesterol, diabetes, hearing loss, or depression, since these often need medical care.
• Do not think it is too late, or too early. Midlife action has the biggest impact, but it is never too late to benefit, and starting sooner is better.

When to talk to a healthcare professional

Some forgetfulness is a normal part of aging, but certain changes deserve professional attention. Consider seeing a doctor if:

• Memory problems are affecting daily life, such as getting lost in familiar places, struggling with familiar tasks, repeating questions, or noticeable changes in personality or judgment.
• You or your family are concerned about your memory or thinking, especially if you have a family history of dementia.
• You need help managing risk factors like blood pressure, cholesterol, diabetes, hearing loss, depression, or sleep problems.
• You want your hearing and vision checked, which is a simple and worthwhile step.

Early evaluation is valuable. Some causes of memory problems are treatable or even reversible, and for dementia itself, earlier assessment allows for better planning and access to support and newer treatments. Raising a concern early is a sign of taking your health seriously, not of overreacting.

What the evidence does NOT prove

A few clarifications keep this grounded and honest. The widely cited figure that 45 percent of dementia is potentially preventable is a population-level estimate of what might be achievable across whole societies, not a promise that any individual can lower their personal risk by that amount, and it refers to preventing or delaying cases. More than half of dementia risk is not explained by these modifiable factors, and the largest contributors, age and genetics, cannot be changed.

Much of the underlying research is observational, which shows associations rather than proving cause and effect, and is vulnerable to reverse causation, since the earliest changes of dementia can themselves cause people to exercise less, withdraw socially, sleep poorly, or neglect hearing and vision, making these look like causes when they may partly be early effects. The FINGER and US POINTER trials are stronger because they are randomized, but they show that lifestyle programs protect thinking and memory in at-risk older adults over about two years, which is not the same as proof that they prevent clinical dementia over a lifetime. In short, these habits meaningfully improve your odds and are worth doing for many reasons, but they are not a guarantee, and no one should feel at fault if dementia develops despite their efforts.

The bottom line

You cannot guarantee that you will avoid dementia, and it is important to be honest about that, because age and genetics matter and lie outside our control. But you are far from powerless. Around 45 percent of dementia cases worldwide are linked to factors we can influence, and strong recent trials show that changing everyday habits can protect the brain.

The most valuable steps are the ones you can sustain: stay physically active, manage your heart health, protect your hearing and vision, keep your mind and social life active, eat well, sleep well, and avoid smoking and excessive alcohol. Start in midlife if you can, but know it is never too late to benefit. Manage medical risk factors with your doctor’s help, raise any memory concerns early, and treat these habits as a way to stack the odds in your favor for your brain and whole-body health, not as a guarantee.

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References

1. Livingston G, Huntley J, Liu KY, et al. “Dementia prevention, intervention, and care: 2024 report of the Lancet standing Commission.” The Lancet, published July 31, 2024. https://doi.org/10.1016/S0140-6736(24)01296-0
2. Ngandu T, Lehtisalo J, Solomon A, et al. “A 2 year multidomain intervention of diet, exercise, cognitive training, and vascular risk monitoring versus control to prevent cognitive decline in at-risk elderly people (FINGER): a randomised controlled trial.” The Lancet, 385:2255-2263, 2015.
3. Baker LD, Espeland MA, Whitmer RA, et al. “Structured vs Self-Guided Multidomain Lifestyle Interventions for Global Cognitive Function: The US POINTER Randomized Clinical Trial.” JAMA, 334(8):681-691, published July 28, 2025. https://doi.org/10.1001/jama.2025.12923
4. Alzheimer’s Association. “U.S. POINTER Study Results.” alz.org/us-pointer/study-results.
5. Barnes LL, et al. “Trial of the MIND Diet for Prevention of Cognitive Decline in Older Persons.” New England Journal of Medicine, 2023 (three-year randomized trial finding no significant difference between the MIND diet and a comparison diet).
6. Alzheimer’s Disease International and Alzheimer Europe summaries of the 2024 Lancet Commission, including hearing loss and high LDL cholesterol as leading modifiable factors.
7. Systematic reviews and meta-analyses on hearing aids and reduced risk of cognitive decline and dementia (e.g., adult-onset hearing loss and cognition literature).

This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Speak with a qualified healthcare professional about your dementia risk, memory concerns, or managing risk factors such as blood pressure, cholesterol, diabetes, hearing loss, or depression.