Brain Health Diet: How Nutrition Supports Cognitive Aging

Originally published April 11, 2022. Updated January 6, 2026.

Healthy Eating and Healthy Living

Researchers observe that there is a link between healthy eating and healthy living, including benefits extending to healthy brain aging.

To promote healthy brain aging and stave off neurocognitive diseases of aging including dementias, Alzheimer’s disease, Parkinson’s disease, and memory loss, there is good reason to believe that a well-balanced, nutritious diet can provide many benefits.

A brain healthy diet can minimize inflammation and insulin resistance, as well as nourish brain cells (neurons) and connections (synapses).

There are no specific diets that have been shown to reduce progression neurodegenerative disorders. However the MIND diet aims at reducing the risk of developing dementia and neurocognitive decline that can come with aging.

While no diet can prevent Alzheimer’s disease or other dementias, dietary patterns high in plant foods, healthy fats, and antioxidants are consistently linked with slower cognitive decline in observational studies.

Integrated Approach to Brain Health

Our specialists advocate programs that integrate healthy lifestyle, nutritional guidelines and physical and cognitive exercise. These together aim at delaying or even preventing neurocognitive decline to promote healthy brain aging.

This whole-person approach aligns with the Pacific Brain Health Center’s 6 lifestyle pillars, which include nutrition, exercise, sleep, stress reduction, social engagement, and cognitive stimulation.

The MIND Diet

The MIND diet, which stands for the Mediterranean-DASH Intervention for Neurodegenerative Delay, combines the brain health benefits of the Mediterranean diet and the Dietary Approaches to Stop Hypertension (DASH) diet.

Patients with coronary artery disease, kidney disease, and diabetes should consult their medical doctors and nutritionists prior to beginning a new diet as those conditions have other dietary restrictions or priorities.

The 15 Dietary Components of the MIND Diet

10 Brain Healthy Food Groups

• Green leafy vegetables
• Other vegetables
• Nuts
• Berries (especially blueberries and strawberries)
• Beans
• Whole grains
• Fish (see note below)
• Poultry
• Olive oil
• Red wine (see note below)

5 Food Groups to Limit

• Red meats
• Butter and stick margarine
• Cheese
• Pastries and sweets
• Fried or fast food

The MIND diet includes at least three servings of whole grains, a salad and one other vegetable every day. It also involves snacking most days on nuts and eating beans every other day or so, poultry and berries at least twice a week and fish at least once a week.

The MIND diet recommends limited eating of the designated unhealthy foods, especially butter (less than 1 tablespoon a day), cheese, and fried or fast food (less than a serving a week for any of the three).

However, please note that because this diet has not been studied in Parkinson’s disease, where patients may have balance issues, which could worsen with alcohol, we do not recommend a daily glass of wine for PD patients. The supplement resveratrol may be taken instead.

Our recommendations are more flexible than the strict limitations of cheese and butter, however, we do recommend limiting excess sugars and processed foods.

We believe that the optimal diet would be for the patient to enjoy high-quality food of limited quantity, even on occasion rich foods or pastries, rather than having high quantities of low quality, processed foods such as diet or fat-free versions of food, which typically have higher sugar content or may use more chemicals to substitute for flavor.

For example, dark chocolate is known to have anti-oxidant qualities so a small amount (an ounce for example) of good quality chocolate, enjoyed with thoughtfulness, would be better than abstaining altogether or attempting to abstain and then breaking a diet with binges of low-quality chocolate.

Fish Intake Guidelines

Regarding fish intake, we recommend avoiding high-mercury fish:

• King Mackerel
• Marlin
• Orange Roughy
• Shark
• Swordfish
• Tilefish
• Ahi Tuna (albacore tuna has lower mercury content and can be had once a week).

Mercury content information can be found on the EPA website.

We recommend fatty fish like salmon, sardines, trout, and albacore tuna for their high amounts of omega-3 fatty acids.

How the MIND diet works

Both the Mediterranean and MIND diets are associated with a reduced risk of cognitive decline and Alzheimer’s disease. While it is still unclear how the MIND diet works, scientists believe a few factors may be involved.

Antioxidant Effects

Antioxidant effects of the recommended brain healthy food groups are thought to help reduce the build-up of large amounts of toxic proteins (called free radicals) in the body. These tend to accumulate due to oxidative stress, which causes cellular breakdown particularly in the brain.

Anti-Inflammatory Benefits

Chronic inflammation is associated with several neurodegenerative diseases. Anti-inflammatory foods—such as vegetables, berries, and olive oil—help minimize this burden.

Beta-Amyloid Accumulation

The MIND diet may help reduce beta-amyloid deposition, one of the hallmark features of Alzheimer’s disease, which disrupts communication between brain cells.

Other Brain Healthy Diet Considerations

Other suggestions for nutritional adjustment include the following:

• Minimize simple carbohydrates
• Minimize processed foods
• Consider a gluten free diet
• Consider a ‘Mediterranean-style’ diet
• Consider a low glycemic index diet
• ​Consider a low grain diet

We caution against “fad diets” including unregulated diet supplements, extreme caloric restriction, etc. which can lead to electrolyte abnormalities associated with elevated risk of seizures, heart attacks, and death.

What Foods Can You Eat on the MIND Diet?

• Vegetables (especially leafy greens)
• Berries
• Nuts
• Beans
• Whole grains
• Seafood
• Poultry
• Olive oil

These foods supply key nutrients such as omega-3 fatty acids, polyphenols, antioxidants, fiber, and monounsaturated fats—all associated with healthier cognitive aging.

H2: What Is the Link Between Diet and the Brain?

Diets high in saturated fat, sugar, and refined carbohydrates are associated with worse cognitive function and increased dementia risk.

In contrast, diets characterized by the following are associated with reduced risk of dementia and Alzheimer’s disease:

• high intakes of vegetables and fruit
• limited meat consumption
• olive oil as the primary fat
• whole grains
• berries and legumes

• Vegetables (especially leafy greens)
• Berries
• Nuts
• Beans
• Whole grains
• Seafood
• Poultry
• Olive oil

These foods supply key nutrients such as omega-3 fatty acids, polyphenols, antioxidants, fiber, and monounsaturated fats—all associated with healthier cognitive aging.

H2: What Is the Link Between Diet and the Brain?

Diets high in saturated fat, sugar, and refined carbohydrates are associated with worse cognitive function and increased dementia risk.

In contrast, diets characterized by the following are associated with reduced risk of dementia and Alzheimer’s disease:

• high intakes of vegetables and fruit
• limited meat consumption
• olive oil as the primary fat
• whole grains
• berries and legumes

Additional Brain Healthy Diet Considerations

Other suggestions for nutritional adjustment include the following:

• Minimize simple carbohydrates
• Minimize processed foods
• Consider a gluten free diet
• Consider a ‘Mediterranean-style’ diet
• Consider a low glycemic index diet
• Consider a low grain diet
  

We caution against “fad diets,” unregulated supplements, or extreme caloric restriction, which can lead to dangerous electrolyte abnormalities and increased risk of seizures or cardiac complications.

Dietary Interventions

Alcohol

Goals: Abstinence, reassessed every 6 months
Methods: May include supervised cessation, peer programs (AA, MATRIX), or medication as needed
Cautions: Sudden withdrawal can be life-threatening
Reasoning: Chronic alcohol use damages brain cells and worsens mood and memory
Bottom line: Alcohol use in the presence of cognitive symptoms is more harmful than helpful

Sugar and Insulin Resistance

Chronically high blood sugar damages the brain just as it damages other organs such as kidneys and eyes.

Goals:

• Fasting glucose 70–90 mg/dL
  
• HgbA1c < 5.6%
  
• Fasting insulin < 4.5 µIU/ml
  

Methods:
Lifestyle changes, primary care involvement, and endocrinology care when indicatedReasoning:
Insulin resistance impairs the brain’s ability to use glucose, and is associated with increased Alzheimer’s disease risk.

About the Brain Wellness & Lifestyle Program at PNI

The Brain Wellness & Lifestyle Program at Pacific Neuroscience Institute® provides personalized guidance to optimize brain health through science-based lifestyle interventions. The program focuses on six key pillars: nutrition, exercise, sleep, stress management, social engagement, and cognitive stimulation. Courses are offered in-person or virtually, in individual or group formats.

Get Personalized Nutrition Guidance

If you’re interested in applying the MIND diet or creating a brain-healthy eating plan, PNI’s nutrition specialists offer personalized assessments and ongoing support tailored to your health goals.

Contact our Brain Wellness & Lifestyle Program to get started.

Lifestyle@pacificneuro.org | 213-344-2037