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Scientists Say Walnuts Boast Anti-Aging BenefitsMilan Markovic – Getty Images
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In recent years, health enthusiasts have turned to various nuts as nutritional powerhouses. Among them, walnuts have emerged as particularly beneficial, thanks to their notable anti-aging properties. Incorporating walnuts into your diet can significantly enhance your overall well-being.
Meet the experts: Melissa Jaeger, R.D., L.D., a nutritionist with MyFitnessPal; and Joanna Gregg, M.S., R.D, food data expert at MyFitnessPal.
These nutrient-dense nuts are not only praised for boosting heart health and showing potential in cancer prevention, but they also play a crucial role in promoting healthy aging.
What Makes Walnuts So Healthy?
Walnuts are not only known for their rich, nutty flavor; they are also packed with essential nutrients that contribute to overall health. Unique among tree nuts, they are an excellent source of alpha-linolenic acid (ALA), a type of omega-3 fatty acid. Additionally, they provide fiber, plant-based protein, antioxidants, and vital micronutrients.
“A one-ounce serving of walnuts delivers key nutrients, including protein, fiber, and magnesium,” explains Melissa Jaeger. “Their endorsement by the American Heart Association’s Heart-Check mark further highlights their heart-healthy qualities.”
What Role Do Walnuts Play in Anti-Aging?
Joanna Gregg, a fellow nutrition expert at MyFitnessPal, notes that the myriad nutrients in walnuts make them a powerful ally in combating aging.
“Walnuts are rich in fatty acids, fiber, and essential vitamins and minerals, all of which contribute to their antioxidant and anti-inflammatory properties,” says Gregg. She references numerous studies linking walnut consumption to a lowered risk of diseases such as cardiovascular disease, depression, and diabetes, while also protecting against cognitive decline.
Gregg points out that the key benefits stem from walnuts’ ability to reduce oxidative stress in the body and positively impact various health metrics, thanks to their antioxidant properties.
“When it comes to anti-aging effects, walnuts contribute to heart and gut health, help alleviate inflammation, and assist in maintaining a healthy weight, all promoting longevity,” Gregg elaborates.
Research from the Nurses’ Health Study, published in the Journal of Aging Research, supports these assertions. This study tracked 33,931 women in their late 50s and early 60s, focusing on their dietary habits, physical health, cognitive function, and chronic illness history.
The results revealed that women consuming at least two servings of walnuts weekly were 20% more likely to be classified as “healthy agers” than those who did not. Healthy agers were defined as those with stable mental health, free of major chronic illnesses or cognitive impairments, and without physical limitations, comprising around 16% of participants. While the initial findings connected general nut consumption to healthy aging, only walnuts retained a significant correlation after adjusting for various factors.
More Health Benefits of Walnuts
The health advantages of walnuts are extensive. They provide significant benefits for cardiovascular health through antioxidants like phytosterols and polyphenols that alleviate oxidative stress, inflammation, and high blood pressure. Additionally, ALA is instrumental in enhancing heart health and reducing heart disease and stroke risks. A 2023 review published in Nutrients indicated that consuming just 10 grams of walnuts daily (about five walnut halves) was associated with a lower risk of cardiovascular disease. Jaeger also highlights that walnuts may contribute to lowering diastolic blood pressure. “Managing both blood pressure and cholesterol levels is crucial for optimal heart health,” she emphasizes.
Among their many benefits, walnuts are known to reduce LDL cholesterol—the “bad” cholesterol. A 2021 study published in Heart.org reinforced this finding after observing older adults who included two servings of walnuts daily over two years. “This recent research further supports earlier studies indicating that integrating walnuts into your diet appears to enhance cholesterol levels,” notes Dr. Deirdre Tobias, an obesity and nutritional epidemiologist at Brigham and Women’s Hospital.
How Many Walnuts Should I Eat?
Incorporating walnuts into your everyday diet is easier than you might expect. “The FDA recommends consuming a daily serving of nuts, which can lower your risk of heart disease,” states the U.S. Food and Drug Administration. Specifically for walnuts, this translates to a small handful or approximately 12-14 halves.
While the FDA doesn’t designate a specific time for consumption, walnuts are versatile enough to complement any meal or snack—whether added to oatmeal, blended in smoothies, or enjoyed alone. The key is regularity, so aim for a daily portion to maximize their heart-healthy and nutrient-rich benefits.
What to Consider When Eating Walnuts for Longevity
According to Harvard Health, there isn’t a single food that can dramatically alter your health. To achieve the best outcomes for a longer, healthier life, a balanced diet and lifestyle—encompassing regular exercise and avoiding smoking—are essential.
Additionally, it’s important to consider the type of fat in nuts. While they contain healthy fats, the Mayo Clinic advises moderation. They recommend four to six servings of unsalted nuts per week for adults.
Jaeger suggests choosing raw, dry-roasted, or unsalted nuts to limit added salt or sugar. “To create a more satisfying snack, consider roasting raw nuts at home with your favorite spices,” she recommends.
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