Alzheimer’s disease is the most common form of dementia, affecting millions of people around the world. While there is still no cure, researchers continue to study lifestyle habits that may help reduce the risk of developing the disease. One area receiving a great deal of attention is diet.
A recent review found that following healthy eating patterns, especially the Mediterranean diet, the DASH diet, and the MIND diet, is associated with better brain health and may help lower the risk of Alzheimer’s disease. Rather than focusing on a single food, these diets emphasize eating a variety of nutrient-rich foods that support both brain and heart health.
The Mediterranean Diet
The Mediterranean diet is one of the most well-studied eating patterns for brain health. It encourages eating foods that are rich in healthy fats, fiber, vitamins, and antioxidants.
The diet focuses on eating more:
- Fruits and vegetables
- Whole grains
- Beans and legumes
- Nuts and seeds
- Olive oil
- Fish and seafood
It also recommends limiting:
- Red meat
- Processed foods
- Butter
- Sugary foods and drinks
The review found that people who closely follow the Mediterranean diet tend to have a lower risk of cognitive decline and Alzheimer’s disease. Researchers believe this is because the diet helps reduce inflammation and oxidative stress while supporting healthy blood vessels that supply the brain.
The DASH Diet Supports Brain Health Too
The DASH diet, which was originally designed to lower blood pressure, may also help protect the brain.
This eating pattern emphasizes:
- Fruits and vegetables
- Whole grains
- Low-fat dairy products
- Lean proteins
- Nuts and legumes
It also limits foods that are high in sodium, saturated fat, and added sugars.
Because high blood pressure is a known risk factor for dementia, improving heart health through diet may also benefit brain health.
The MIND Diet Combines the Best of Both
The review also highlights the MIND diet, which combines parts of the Mediterranean and DASH diets while placing extra focus on foods linked to brain health.
The MIND diet encourages eating:
- Leafy green vegetables
- Other vegetables
- Berries
- Whole grains
- Nuts
- Beans
- Fish
- Poultry
- Olive oil
It recommends limiting:
- Butter
- Cheese
- Fried foods
- Pastries and sweets
- Red meat
Several studies included in the review found that people who followed the MIND diet had a lower risk of Alzheimer’s disease and slower cognitive decline.
Why Do These Diets Help?
Although researchers are still learning exactly how these diets protect the brain, they believe several factors work together.
These eating patterns provide antioxidants that help protect brain cells from damage. They are also rich in healthy fats that support communication between brain cells and help reduce inflammation. In addition, these diets improve heart and blood vessel health, which helps ensure the brain receives enough oxygen and nutrients.
Healthy Habits Work Together
The review emphasizes that diet is only one part of maintaining brain health. Regular physical activity, good sleep, staying socially active, managing blood pressure and diabetes, and challenging your brain with learning and other mentally stimulating activities all work together with healthy eating to support healthy aging.
What This Means for You
While no diet can completely prevent Alzheimer’s disease, growing evidence suggests that healthy eating patterns may help lower the risk. Choosing more vegetables, fruits, whole grains, beans, nuts, fish, and olive oil while limiting processed foods, sugary treats, and red meat may help protect your brain as you age. Small changes made over time can support not only brain health but overall health as well.
Source
Moustafa AA, et al. Dietary patterns and Alzheimer’s disease: A comprehensive review. Brain Sci. 2025.
Available from: https://pmc.ncbi.nlm.nih.gov/articles/PMC13049596/. Accessed July 28, 2026.
