Health Benefits of Walnuts

benefits of walnuts

( These wrinkly lobes surely are popular and versatile! Walnuts have a long history as food, having been around from as far back as 7,000 B.C., and were popular as food for the royals in ancient Persia. Nowadays, the US is a major producer of walnuts, with the bulk of the nuts coming from the state of California. Among all nuts, walnuts pack significantly higher amount omega-3 fatty acids ALA! They are rich in fiber, B vitamins, magnesium, and antioxidants such as Vitamin E. Indeed, walnuts are one of the best plant sources of protein!

Health Benefits of Walnuts

Heart-Health Benefits: 

More than a decade of scientific evidence shows that incorporating walnuts in a healthy diet reduces the risk of heart disease by improving blood vessel elasticity and plaque accumulation. Walnuts have also been shown to aid in the lowering LDL cholesterol (the bad cholesterol) and the C-Reactive Protein (CRP). CRP was recently recognized as an independent marker and predictor of heart disease.

Diabetes Benefits:

A study published in Diabetes Care in 2010 found that 2 ounces of walnuts per day improve blood flow in people with type 2 diabetes.  A previous study also found that a diet supplemented with walnuts help type 2 diabetes patients lower their LDL cholesterol by 10%.

Nutrition Tidbits for Walnuts

1 oz (14 halves) of shelled whole walnuts contains:

  • Calories: 185 kcal
  • Fat: 18.5 g
  • Carbohydrates: 3.9 g
  • Protein: 4.3 g
  • Fiber: 1.9 g
  • Glycemic Index (GI): Low (below 55)

FDA Approved Health Claim for Walnuts

In 2003, the FDA recognized the benefits of nuts and their role in heart disease prevention by approving a health claim for 7 kinds of nuts (almonds, hazelnuts, peanuts, pecans, some pine nuts, pistachios and walnuts). These seven nuts were approved as they are the only kinds that contain less than 4 grams of saturated fats per 50 grams.

In response to a petition filed by the California Walnut Commission, the FDA further endorsed the health benefits of walnuts by approving the following health claim in March 2004.

"Supportive but not conclusive research shows that eating 1.5 oz of walnuts per day, as part of a low saturated fat and low cholesterol diet, and not resulting in increased caloric intake may reduce the risk of coronary heart disease."

Adding Walnuts in a Healthy Diet

Nuts in general are high in calories, so moderation is the key. The best approach is to reap the health benefits of eating walnuts but not add excessive calories to your daily intake. Therefore, instead of just adding walnuts to your current diet, eat them in replacement of foods that are high in saturated fats (such as cheese and meat) and limit your intake of these tasty treats to the recommended 1.5 oz per day. That is about 20 walnut halves.

Walnuts add a flavorful crunch to dishes. Here are some simple ideas to incorporate walnuts in your diet to reap their health benefits:

  • instead of snacking on cookies, crack some walnuts open and eat them as snacks
  • instead of using meat, toss toasted walnuts in your salad or pasta to add some crunch
  • instead of layering pepperoni, use chopped walnuts in your pizza
  • instead of eating bacons or eggs, use walnuts as a protein choice by sprinkling chopped walnuts in your oatmeal or breakfast cereal
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HealthCastle, founded in 1997, is the largest online nutrition community run by Registered Dietitians. Information on this site is provided for informational purposes and is not meant to substitute for the advice provided by your own physician or dietitian. Information and statements have not been evaluated by the Food and Drug Administration and are not intended to diagnose, treat, cure, or prevent any disease.