Reducing Your Risk of Dementia: A Practical Guide for Family Caregivers

If you are caring for a loved one with Alzheimer's disease, you may worry about your own risk of developing dementia. This is a very common concern, and the good news is that research shows there are many things you can do to lower your chances. While there is no guaranteed way to prevent dementia, studies suggest that up to 45% of cases could be delayed or prevented by addressing lifestyle factors. This guide offers concrete, science-backed steps you can take starting today to protect your brain health and feel more in control.

Key points

Up to 45% of dementia cases may be delayed or prevented by addressing 14 modifiable risk factors.
The single most powerful thing you can do is regular aerobic exercise—it releases BDNF, which strengthens memory centers.
Treating hearing loss, even mild, is crucial—it doubles dementia risk if left untreated.
A Mediterranean-style diet (fish, vegetables, olive oil, nuts) supports both heart and brain health.
Manage blood pressure, cholesterol, and blood sugar—these silently damage brain blood vessels.
Stay socially and mentally active to keep your brain engaged and resilient.

What is Dementia and Why Can We Reduce Our Risk?

Dementia is not a single disease but an umbrella term for a decline in cognitive ability severe enough to interfere with daily life. Alzheimer's disease is the most common form, but there are many others. The brain changes that lead to dementia often begin years, even decades, before symptoms appear. This long 'preclinical' phase gives us a window of opportunity to make changes that can slow or prevent the process.

Research from the 2024 Lancet Commission has identified 14 modifiable risk factors—things we can change—that together account for nearly half of all dementia cases. These include factors like high blood pressure, hearing loss, smoking, depression, physical inactivity, and social isolation. By addressing these, we can significantly lower our risk. This is not about being perfect or avoiding all risk, but about making meaningful, manageable changes that stack the odds in our favor.

Why Lifestyle Changes Are So Powerful for Brain Health

Many of the same things that keep your heart healthy also keep your brain healthy. Your brain depends on a steady supply of oxygen and nutrients delivered through your blood vessels. Conditions like high blood pressure, high cholesterol, and diabetes damage these vessels, starving brain cells and increasing dementia risk. A healthy diet, regular exercise, and not smoking all protect your blood vessels and your brain.

Exercise has a particularly powerful effect. When you do aerobic activity, your body releases a chemical called brain-derived neurotrophic factor (BDNF). This 'fertilizer' for the brain actually helps grow and strengthen the memory centers in your brain. It's one of the most protective things you can do. Similarly, treating hearing loss is crucial because when you can't hear well, you tend to withdraw from conversations and social activities, leading to brain-stimulating interactions being lost.

General caregiving information, not medical advice. Check medications and major care changes with your clinician.

Step-by-step

Get your hearing checked and treat any hearing loss promptly. Even mild hearing loss doubles dementia risk. If hearing aids are recommended, wear them consistently.
Move your body every day with at least 30 minutes of moderate aerobic exercise most days—brisk walking, swimming, cycling, or dancing. Consistency matters more than intensity.
Eat a Mediterranean-style diet rich in vegetables, fruits, whole grains, fish, nuts, and olive oil, while limiting red meat, processed foods, and saturated fats.
Work with your healthcare professional to keep blood pressure, cholesterol, and blood sugar in a healthy range. Take prescribed medications as directed and don't skip checkups.
If you smoke, seek help to quit. Smoking damages blood vessels and reduces oxygen flow to the brain. Quitting at any age reduces your risk.
Limit alcohol to no more than one drink per day for women and two for men. Heavy drinking significantly raises dementia risk.
Stay socially and mentally active. Connect with others regularly and challenge your brain with new activities like learning a language or playing an instrument.
Prioritize good-quality sleep with a consistent schedule, a cool dark bedroom, and no screens before bed. If you snore loudly or have breathing pauses, see a doctor for possible sleep apnea.
Address depression proactively. If you feel persistently sad or lose interest in things you used to enjoy, seek treatment—therapy, medication, or both can protect your brain.
Protect your head from injury by wearing a seatbelt, using a helmet when cycling or skiing, and fall-proofing your home with good lighting and grab bars.

What not to do

Don't assume there's nothing you can do—up to 45% of dementia cases may be delayed or prevented through lifestyle changes.
Don't try to change everything at once. Pick one or two small changes to start with and build from there.
Don't rely on supplements or 'brain-boosting' products. No supplement has been proven to prevent dementia.
Don't become socially isolated because you're busy caregiving. Your brain needs stimulation and you need support.

Practical tools

The 'Start Small' Action Plan
Write down one small change you will make this week—for example, 'I will walk for 10 minutes after lunch on Monday, Wednesday, and Friday.' Put it on your fridge or set a phone reminder. After a week, add another small change.
Mediterranean Diet Swap List
Keep a list on your fridge of simple swaps: butter for olive oil, red meat for fish twice a week, white bread for whole grain, chips for a handful of nuts, sugary desserts for fresh fruit.
Hearing Help Resources
Medicare Part B covers diagnostic hearing exams. Some state programs offer free or low-cost hearing aids. The Hearing Loss Association of America can point you to local resources.
Social Connection Calendar
Schedule one social activity per week and protect that time as you would a medical appointment—a video call with a friend, a walk with a neighbor, or attending a caregiver support group.

Does consuming olive oil reduce the risk of dying from dementia?

Yes, olive oil is a key part of a Mediterranean-style diet that supports brain health. Drizzle it on vegetables or use it in place of butter to help protect your memory.

Does eating red meat increase my risk of dementia?

Red meat is okay in moderation, but a diet high in red and processed meats can increase dementia risk. Try swapping it for fish, beans, or lentils a few times a week.

How can nurses support a person with dementia to participate in rehabilitation decisions?

Speak directly to the person using simple, one-step instructions and plenty of time. Support their independence by offering two clear choices, like 'would you like to stand or sit for this exercise?'

How do I respond when a person with dementia wants to do something risky?

First, validate their feeling behind the wish, like 'you want to feel useful.' Then redirect to a safe alternative, such as, 'Let's fold towels together instead of climbing that ladder.'

What is the DIFRID intervention and how can post-fall care be delivered for people with dementia?

The DIFRID intervention is a structured approach to assess and treat falls in people with dementia. After a fall, check for pain or injury calmly, then offer a warm blanket and help them rise slowly with support.

Why can my loved one with dementia still make polite conversation but not remember details?

Polite conversation uses overlearned social scripts stored in a different brain region, while recalling new details requires memory centers damaged by dementia. Simply nod and smile instead of correcting them.

What is a Medicare dementia care planning visit and what does it cover?

A Medicare dementia care planning visit is a yearly appointment where your doctor creates a care plan addressing safety, medications, and support services. Bring your questions and a list of current symptoms to make the most of it.

Can a person with semantic dementia relearn a complex everyday task through ecological rehabilitation?

Yes, through ecological rehabilitation that breaks the task into small, repeated steps using real-life cues. Practice one step at a time—like brewing tea—with the same mug and counter setting daily.

How should I respond when a person with dementia is mean?

When a person with dementia is mean, remember the behavior comes from the disease, not them. Stay calm, step back for a moment, then redirect with a soothing topic or a simple activity like offering a snack.

How can I help a person with dementia or myself feel less anxious about a PET scan?

Explain that the PET scan is a big camera that takes pictures of your brain's health. Practice slow breathing together beforehand, and bring a comfort item or favorite music to the appointment.

What public health efforts are being made to improve early and equitable dementia detection?

Public health efforts now focus on training primary care doctors to use quick cognitive tests and addressing language/cultural barriers. You can ask your local health department about memory screening events near you.

Does learning a new language reduce my risk of dementia?

Learning a new language is a great mental challenge that builds cognitive reserve. Even practicing a few words daily on a language app can strengthen your brain's resilience.

How should I critically evaluate dementia risk studies and headlines?

Focus on large, repeated studies from reputable sources, not single headlines. Ask yourself: 'Was the study done on humans? Did it control for other lifestyle factors?' before changing your habits.

Why is my loved one with dementia at higher risk for skin tears, bruises, and burns?

Dementia thins the skin and reduces pain awareness, making tears and burns more likely. Use gentle soaps, keep bath water warm not hot, and trim nails carefully to avoid scratches.

How can renaming everyday items and activities help a person with dementia cooperate?

Renaming fills a needed role with dignity, such as calling a walker a 'shopping buddy' or hand lotion 'queen's cream'. This turns a task into a positive identity rather than a loss of ability.

What can I eat instead of red meat to lower dementia risk?

Swap red meat for fatty fish like salmon, plus beans, lentils, and nuts. These provide omega-3s and fiber that directly support brain blood flow and function.

Why do people with dementia fall more often, and what helps?

Poor balance, vision changes, and dementia-related judgment issues increase fall risk. Remove scatter rugs, install grab bars in the bathroom, and encourage walking with a cane or walker for stability.

Can walking reduce the risk of cognitive impairment and dementia?

Yes, walking is an excellent form of aerobic exercise that boosts BDNF, a protein that strengthens memory. Aim for a brisk 30-minute walk most days to lower your dementia risk.

What can I do to protect my brain from dementia?

The single most powerful thing is regular aerobic exercise—think brisk walking, swimming, or dancing. Pair it with treating hearing loss, eating Mediterranean-style meals, and managing blood pressure for best results.

Discuss with your clinician

Ask your doctor: 'Based on my personal and family health history, what is my specific risk for dementia?'

Ask your doctor: 'What are my current blood pressure, cholesterol, and blood sugar numbers, and are they in a healthy range for my brain?'

Ask your doctor: 'Should I have a hearing test or eye exam? I've noticed some changes.'

Ask your doctor: 'I'm having trouble sleeping. Could I have sleep apnea, and should I be tested?'

Ask your doctor: 'I'm feeling down or anxious. Can you help me find a therapist or treatment that's right for me?'

Ask your doctor: 'Are there any medications I'm taking that could affect my cognitive health?'

Ask your doctor: 'I want to start exercising more. What type and intensity are safe for me?'