Which Is Better for Your Brain? Doctors Break It Down

Avocados and walnuts don’t seem like they have much in common, yet both contain healthy fats linked to better brain health. If you had to choose just one, walnuts tend to pull ahead, but that doesn’t mean avocados lose their status as a “superfood.” 

Each offers distinct brain-supporting nutrients, which means there’s still a lot of value in eating both. We asked doctors and nutrition experts to break down how their nutrients influence everything from mood to memory.

Health Benefits of Avocado

Avocados may be best known for their heart-healthy fats, but those same nutrients also play a meaningful role in brain function. “Avocados are rich in healthy, monounsaturated fats,” says Karen Flannery, MD, a physician and founder of Palm Beach Wellness Institute. “These may help reduce inflammation and protect vascular health, which is great for someone looking to maintain a healthy blood pressure and overall cardiovascular function.” These heart-specific benefits also indirectly support your brain as you age.  

‌As far as the direct impact the brain, Dr. Flannery says avocado consumption has been linked to potential improvements in memory, attention, and executive function in older adults. The primary mechanism behind the brain benefit is lutein—a carotenoid which can cross the blood-brain barrier and protect neurons from oxidative stress. Lutein also accumulates in your eyes.

Bronwyn Holmes, MD, a board-certified physician and medical advisory board member at Eden, points to one study that linked daily avocado eating for six months with improvements in participants’ ability to focus on tasks. Interestingly enough, their eye lutein levels were directly linked to better problem-solving and working memory. “The scientific evidence shows that lutein from avocados improves your ability to stay focused throughout hours of work, and your ability to remember specific details as you get older,” she says. 

One serving is around one medium sized avocado, or 140 grams (g). According to USDA data, this amount of avocado provides the following nutrients: 

Calories: 312
Protein: 2.53 g
Carbohydrates: 11.6 g
Fat: 28.4 g
Magnesium: 45.9 milligrams (mg)
Potassium: 806 mg

Health Benefits of Walnuts

Unlike most other plant foods, walnuts contain a concentrated source of omega-3 fats that researchers associate with cognitive resilience and mental performance. “Walnuts provide high amounts of alpha-linolenic acid (ALA), a plant-based form of omega-3,” says Dr. Flannery. “Omega-3s are known to help support neuron signaling and may reduce oxidative stress. This might help support certain aspects of cognitive performance, such as reaction time, making walnuts potentially more beneficial for someone looking for long-term cognitive resilience.”

Lauren Manaker, MS, RDN, LD, a registered dietitian and founder of Nutrition Now Counseling, cites a study focusing on healthy young adults that evaluated whether eating walnuts for breakfast is linked to improved brain function throughout the day. “Researchers found that walnut consumption was associated with people reacting faster on tasks and improved memory later in the day compared to a nut-free breakfast,” she says. “Brain activity showed walnuts might influence attention and memory, and blood tests suggested they could provide more energy by supporting glucose availability.”

One serving is around 10 walnut halves, or 30 grams. According to USDA data, this amount of walnuts provides the following nutrients: 

Calories: 219
Protein: 4.38 g
Carbohydrates: 3.27 g
Fat: 20.9 g
Magnesium: 42.6 mg
Potassium: 127 mg

Which Superfood Is Better for Brain Health?

The health experts we spoke to mostly agreed that you should consume regular amounts of avocados and walnuts. “Ideally, one would include both in a brain-healthy diet,” says Dr. Flannery. “Both avocados and walnuts offer benefits for your brain’s health, but there is no clear answer regarding which is objectively better.”

Still, one expert thinks walnuts are the slightly better option. “I would select walnuts as my first choice for immediate protection against cognitive deterioration because of their specific brain health benefits,” says Dr. Holmes, who emphasizes the importance of walnuts’ omega-3 ALA content. “The lutein content in avocados delivers brain benefits too, but walnuts offer extensive neuroprotective effects through their omega-3 pathway.”

While lutein in avocados supports working memory and sustained attention, the omega-3s in walnuts are better at protecting your brain from neuroinflammation, Dr. Holmes points out. Regardless, she still agrees that the two foods work together to create better results than when used separately. “The most effective approach to achieve brain health benefits involves consuming both avocados and walnuts as part of your daily diet.”