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1. Heart health

Walnuts are a great source of alpha-linolenic acid (ALA), an omega-3 fatty acid that is important for reducing inflammation. In fact, it is the only nut significantly high in these omega-3 fatty acids. Their anti-inflammatory compounds may reduce the risk of heart disease.

Learn 8 ways to reduce your risk of heart disease

2. Brain health

Studies have shown that the antioxidants and anti-inflammatory polyphenols (compounds) found in walnuts may improve brain function and slow mental decline that occurs with aging. Cognitive functions include your memory and ability to think.

Explore other foods for brain health and how you can keep your mind sharp

3. Gut health

Bacteria and microbes in your intestines and gut are also essential to your health. Research shows walnuts can improve gut health. In a clinical trial, adults who ate walnuts every day had healthier gut bacteria.

4. Cancer prevention

Microbes in your gut take compounds found in walnuts and produce urolithin compounds. These urolithins may help lower risk for certain cancers. Research is still being done to fully understand walnuts' potential role in cancer prevention.