Lowering Your Risk of Alzheimer’s: What You Can Do Today

The Big Picture: You Have More Power Than You Think

Alzheimer’s disease is the most common cause of dementia, affecting over 55 million people worldwide.
While age and genetics play a role, research shows that up to 45% of dementia cases may be preventable or delayed by addressing 14 known risk factors throughout life.
Healthy lifestyle choices can reduce your risk even if you have a family history of Alzheimer’s disease. Studies show that people who follow 4 or 5 healthy habits have a 60% lower risk of developing Alzheimer’s — regardless of their genetic risk.
It is never too early or too late to start protecting your brain.

Regular physical activity is one of the most powerful tools for brain health.
Aim for at least 150 minutes per week of moderate activity (brisk walking, swimming, cycling) or 75 minutes of vigorous activity.
Exercise improves blood flow to the brain, promotes the growth of new brain cells, and reduces inflammation.
People who are regularly active have approximately a 25% lower risk of developing dementia.

The Mediterranean and Mediterranean-DASH Intervention for Neurodegenerative Delay (MIND) diets are the most studied dietary patterns for brain health.
Focus on:
- Green leafy vegetables (spinach, kale) — at least 6 servings per week
- Berries (blueberries, strawberries) — at least 2 servings per week
- Fish — at least 1 serving per week
- Nuts, beans, whole grains, and olive oil
Limit red meat, fried foods, pastries, sweets, and butter/margarine.
Higher adherence to the MIND diet has been linked to less Alzheimer’s-related brain pathology, equivalent to being about 4 years younger in brain age.

What is good for your heart is good for your brain. Many of the same risk factors for heart disease also increase dementia risk.
Manage your blood pressure — midlife hypertension is one of the strongest modifiable risk factors for dementia.
Control blood sugar — diabetes increases dementia risk. Work with your doctor to keep blood sugar in a healthy range.
Manage cholesterol — high LDL cholesterol is now recognized as a risk factor for dementia.
Maintain a healthy weight — midlife obesity is linked to higher dementia risk.

Aim for 7–8 hours of sleep per night. Both too little and too much sleep are associated with increased dementia risk.
Sleep allows the brain to clear toxic proteins, including amyloid-beta, which builds up in Alzheimer’s disease.
If you snore loudly, stop breathing during sleep, or feel excessively tired during the day, talk to your doctor about sleep apnea — it is also linked to higher dementia risk.

Social isolation and loneliness are significant risk factors for dementia. Loneliness alone is associated with a 42% increased risk.
Stay engaged through regular contact with friends and family, community groups, volunteering, or group activities.
Strong social engagement is associated with approximately a 19% lower risk of dementia.

Engage in mentally stimulating activities: reading, puzzles, learning a new language or instrument, taking classes, or playing strategy games.
Cognitive activity builds “cognitive reserve” — the brain’s ability to resist damage and continue functioning well.
Combining mental and physical activity (such as dance classes or group sports) may provide the greatest benefit.

Hearing loss is the single largest modifiable risk factor for dementia, accounting for up to 7% of cases.
If you have hearing loss, use hearing aids — studies show hearing aid use is associated with a 19–33% lower risk of cognitive decline and dementia.
Protect your ears from excessive noise exposure.
Untreated vision loss is also a newly recognized risk factor. Get regular eye exams and use corrective lenses as needed.

Emerging research suggests that routine adult vaccinations may help protect against Alzheimer’s disease and dementia. While the evidence is still observational, the findings are consistent and striking:
- Shingles (herpes zoster) vaccine: associated with a 24% lower risk of any dementia and a 47% lower risk of Alzheimer’s disease
- Flu (influenza) vaccine: associated with a 13–31% lower risk of dementia, with greater protection seen with repeated annual vaccinations
- Pneumonia (pneumococcal) vaccine: associated with a 36% lower risk of Alzheimer’s disease
- Tdap (tetanus, diphtheria, pertussis) vaccine: associated with a 30–33% lower risk of dementia
Vaccinations may protect the brain by preventing infections that trigger inflammation, a process linked to Alzheimer’s disease development.
Staying current on recommended vaccinations is a simple, low-cost step that benefits overall health and may also protect brain health.

Smoking damages blood vessels in the brain and increases inflammation. Quitting at any age reduces your risk.

Excessive alcohol consumption is a recognized risk factor for dementia. If you drink, do so in moderation.

Depression is both a risk factor for and an early symptom of dementia. If you feel persistently sad, anxious, or withdrawn, seek help — treatment matters.
Traumatic brain injury (TBI) increases dementia risk. Wear seatbelts, use helmets during sports and cycling, and take steps to prevent falls, especially as you age.

Exposure to air pollution (particularly fine particulate matter, PM2.5) is linked to higher dementia risk.
When possible, limit exposure to heavy traffic and industrial pollution. Use air filters indoors if you live in a high-pollution area.

You do not need to do everything perfectly. Every healthy change you make — at any age — can help protect your brain.
The most impactful steps are: staying physically active, eating a brain-healthy diet, managing heart health, staying socially connected, getting quality sleep, treating hearing loss, and keeping up with vaccinations.
Talk to your doctor about your personal risk factors and what steps are right for you.