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Scientists Say Walnuts Boast Anti-Aging BenefitsMilan Markovic – Getty Images
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Among various nuts hailed as superfoods, one nut stands out for its remarkable longevity benefits: walnuts. Their impressive anti-aging properties make them an essential part of any nutritious eating plan.
Meet the experts: Melissa Jaeger. R.D., L.D., a nutritionist at MyFitnessPal; and Joanna Gregg, M.S., R.D., food data curator at MyFitnessPal.
Walnuts are not just beneficial for heart health and potential cancer prevention—research indicates they also play a crucial role in healthy aging.
What Makes Walnuts So Healthy?
It’s not solely their delightful nutty flavor that positions walnuts as a top pick; they are dense with nutrients that benefit overall health. As the only tree nut recognized as an excellent source of alpha-linolenic acid (ALA) omega-3 fatty acids, walnuts are also rich in fiber, plant-based protein, antioxidants, and essential micronutrients.
“A one-ounce serving of walnuts provides valuable nutrients such as protein, fiber, and magnesium,” says Melissa Jaeger. R.D., L.D. “Their heart health advantages are underscored by their certification from the American Heart Association’s Heart-Check mark, which indicates they meet criteria for heart-healthy foods.”
The Role of Walnuts in Anti-Aging
According to Joanna Gregg, these nutrients make walnuts a remarkable asset in combating aging from within.
“Walnuts harbor various components such as fatty acids, fiber, and essential vitamins and minerals that exhibit antioxidant and anti-inflammatory effects throughout the body,” explains Gregg. She references several studies that suggest that regular walnut consumption correlates with a reduced risk of conditions such as cardiovascular disease, depression, and diabetes, all while safeguarding against cognitive decline with age.
Gregg notes that many health benefits arise from walnuts’ capacity to combat oxidative damage and improve various health markers, thanks to the robust antioxidants they contain.
“In terms of anti-aging, walnuts contribute to heart and gut health, lower inflammation, and promote a healthy weight—all key factors for longevity,” she adds.
According to data from the Nurses’ Health Study published in the Journal of Aging Research, walnuts are uniquely associated with healthy aging compared to other nuts. Researchers monitored 33,931 women in their late 50s and early 60s, taking notes on their diets, physical health, memory, and chronic diseases.
The study found that women who consumed at least two servings of walnuts weekly had a 20% greater likelihood of being classified as “healthy agers” compared to those who did not eat walnuts. Healthy agers were defined as having sound mental health, free from major chronic diseases or memory issues, and lacking physical disabilities, accounting for about 16% of participants. Though initial analysis indicated a connection between overall nut intake and healthy aging, only walnuts retained a significant link after adjusting for various factors.
Additional Health Benefits of Walnuts
The list of benefits is extensive! Walnuts are particularly effective for cardiovascular health. Antioxidants, including phytosterols and polyphenols, work to reduce oxidative stress, lower inflammation, and decrease blood pressure, while ALA aids heart health and diminishes the risk of heart disease and stroke. A recent review published in Nutrients found that consuming just 10 grams of walnuts daily (roughly five walnut halves) was associated with a lower risk of cardiovascular disease. Jaeger also mentions that walnuts may contribute to lower diastolic blood pressure. “Both blood pressure and cholesterol management are crucial for supporting overall heart health,” she advises.
A standout advantage is walnuts’ ability to lower LDL (bad cholesterol), as highlighted by Heart.org. A 2021 study published in Circulation corroborated this finding, revealing that older adults who incorporated two servings of walnuts into their diet daily over two years improved their cholesterol profiles. “This recent research supports previous evidence that adding walnuts can enhance cholesterol levels,” stated Dr. Deirdre Tobias, an obesity and nutritional epidemiologist at Harvard-affiliated Brigham and Women’s Hospital.
How Many Walnuts Should I Eat?
Integrating walnuts into your daily diet is simple and beneficial. The U.S. Food and Drug Administration (FDA) recommends that a diet including one ounce of nuts daily can lower heart disease risk. For walnuts, this translates to roughly a small handful, or about 12-14 halves.
While the FDA does not specify an ideal time for consumption, walnuts are versatile enough to complement any meal or snack—whether sprinkled over oatmeal, blended into smoothies, or enjoyed on their own. The key is consistency, so aim for a daily serving to fully reap their heart-healthy and nutrient-rich benefits.
Things to Consider When Eating Walnuts for Longevity
As noted by Harvard Health, there is no single miraculous food that can transform your dietary habits. For the health and longevity outcomes you desire, a balanced and nutritious diet combined with regular exercise and avoiding smoking are vital.
It’s also important to consider fat content. Although walnuts contain beneficial “healthy fats,” the Mayo Clinic points out that these fats can add up. Walnuts should be consumed in moderation; the clinic recommends four to six servings of unsalted nuts per week for adults.
Jaeger advises choosing raw, dry-roasted, or unsalted varieties to limit added salt or sugar. “To create a more satisfying snack, consider roasting raw nuts at home, seasoned with your favorite spices,” she suggests.
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