The conversation around brain health has shifted dramatically in recent years. While dementia was once viewed as an inevitable part of aging, current research suggests a much more hopeful reality: A significant proportion of dementia cases may be preventable through targeted intervention. This represents one of the most important opportunities in preventive medicine.
First, it’s helpful to clarify terms. Dementia is not a single disease, but an umbrella term describing a decline in memory, thinking or behavior severe enough to interfere with daily life. Alzheimer’s disease, on the other hand, is a specific neurodegenerative condition and the most common cause of dementia, characterized by amyloid plaques and tau tangles in the brain. While Alzheimer’s is currently irreversible, the processes that contribute to it often begin decades before symptoms arise and are strongly influenced by modifiable factors.
This is where prevention becomes powerful.
What Can We Actually Control?
Emerging evidence continues to reinforce a central theme: what’s good for the heart is good for the brain. Cardiovascular risk factors such as high blood pressure, insulin resistance or diabetes, high cholesterol and obesity directly impact brain health by impairing blood flow, increasing inflammation and accelerating neurodegeneration. Treating these conditions aggressively in midlife is one of the most effective strategies we have to reduce dementia risk.
In fact, we KNOW that treating these conditions with the very same medications we use for arterial health also benefit the brain. These include statins, blood pressure medications such as Ramipril and Losartan, Vitamin B3 (Niacin) and pioglitazone.
Lifestyle Strategies That Protect the Brain
Physical activity remains one of the most impactful interventions. Regular aerobic exercise, combined with strength and balance training, improves blood flow to the brain, stimulates neuroplasticity and reduces harmful protein buildup. Even moderate, consistent movement can make a meaningful difference.
Cognitive engagement is equally important. Activities that challenge the brain such as word games, puzzles, learning a new skill and multi-step exercise (like tennis or boxing) help to build “cognitive reserve,” allowing the brain to function better for longer despite underlying changes. Don’t skip your morning Wordle or crossword puzzle!
Nutrition also plays a central role. The MIND diet, which blends elements of the Mediterranean and DASH diets, has been specifically designed for brain health. It emphasizes leafy greens, berries, nuts, whole grains, fish and olive oil, while limiting processed foods, red meat and sweets. Even moderate adherence has been associated with up to a meaningful reduction in dementia risk.
Alcohol intake is another area where our understanding has shifted. While older dietary recommendations allowed for moderate consumption, current evidence suggests that alcohol does not provide any protective benefit for the brain, making limitation a sensible choice for those focused on preserving healthy brain function.
Targeted Supplementation
Targeted supplementation may also play a supportive role. Omega-3 fatty acids, particularly DHA, are essential for maintaining optimal cognitive function. Methylated B vitamins help to regulate homocysteine level, which is linked to brain atrophy and neuroinflammation when elevated. Vitamin D also contributes to neuroprotection and immune regulation within the brain.
Creatine is an emerging area of interest in cognitive health. Known for its role in muscle performance, it may also play a supporting role in brain energy metabolism and could improve memory, attention and mental clarity, particularly in times of stress or fatigue. We are paying attention to the developing science here and will update our recommendations for dosing as the evidence becomes more robust.
Other supportive nutrients include CoQ10 and choline, both of which contribute to cellular energy and neurotransmitter function.
The Big Picture
Beyond diet and exercise, sleep quality (and untreated sleep apnea), stress management, social connection and even hearing health all play meaningful roles in long-term cognitive health.
The most important takeaway? Brain health is not determined by genetics alone. While we can’t change our age or genetic profile, we have substantial control over the daily habits that shape our cognitive future.
In many ways, dementia prevention is no longer about a single intervention, it’s about a comprehensive, lifelong approach. And the earlier we start, the greater the impact.