Daily consumption of walnuts can strengthen heart and brain health, improve sleep, and reduce the risk of certain diseases, health platform Verywell Health reported.
The publication highlighted that the nutrient-dense tree nuts are rich in omega-3 fatty acids, protein, dietary fiber, and natural melatonin, offering multiple evidence-based health advantages.
Heart Health and Essential Fatty Acids
Walnuts stand out as the only tree nuts that contain significant amounts of alpha-linolenic acid, a plant-based omega-3 fatty acid. Alpha-linolenic acid is an essential fat that the human body cannot produce on its own and must obtain through dietary sources.
The nuts serve as a cornerstone of the Mediterranean diet, an eating pattern widely recognized for promoting cardiovascular health. According to Medline Plus, an information service of the United States National Library of Medicine, omega-3 fatty acids help protect the heart and reduce the risk of stroke, proving especially beneficial for individuals with existing heart conditions.
Nutritional Value and Diet Quality
Beyond healthy fats, walnuts provide vital structural nutrients needed by the human body. A single 28-gram portion of walnuts delivers 4.32 grams of protein and 1.9 grams of dietary fiber.
A study published in the peer-reviewed journal Nutrients found that consuming 28 grams of walnuts daily improves overall diet quality. Researchers observed that this daily habit helps supply essential nutrients that are frequently lacking in standard dietary routines.
Brain Function and Cognitive Support
Although walnuts can be eaten at any time of day, incorporating them into breakfast offers distinct cognitive benefits. A small study published in the journal Food & Function showed that individuals who consumed walnuts in the morning demonstrated faster reaction times on tasks requiring executive functions throughout the day compared to those who did not eat them for breakfast.
Executive functions encompass higher-level mental skills such as decision-making, working memory, and cognitive flexibility. In addition, study participants who ate morning walnuts achieved higher memory test scores six hours after consumption than non-consumers.
Sleep Regulation and Insomnia
Walnuts also serve as a natural source of melatonin, a key hormone that signals to the body that it is time to relax and rest. Melatonin plays a central role in regulating internal circadian rhythms and sleep-wake cycles.
A study published in 2017 in Nutrients established that eating foods rich in melatonin can help reduce symptoms of insomnia.
Lowering Chronic Disease and Cancer Risk
Health experts frequently recommend walnuts to lower the risk of chronic conditions, stating that the nuts may also reduce cancer risk in certain individuals. Studies indicate that eating walnuts is associated with a lower risk of prostate cancer, a reduced risk of colorectal cancer, and slowed tumor growth in breast cancer cases.
However, Verywell Health clarified that incorporating walnuts into a daily diet will not eliminate cancer risk entirely. The publication emphasized that specific foods should never be used as a substitute for approved medical treatments or cancer medications.
