However, this antioxidant content could decrease after the roasting process ( 10, 11, 12). The majority of the antioxidants present are concentrated in the skin of the nut. They could also be beneficial for heart health and protecting against cancer ( 6, 7, 8).Īn 8-week study showed that eating hazelnuts, with or without the skin, significantly decreased oxidative stress compared to not eating hazelnuts, which caused no effects ( 9). They are proven to help decrease blood cholesterol and inflammation. The most abundant antioxidants in hazelnuts are known as phenolic compounds. Hazelnuts provide significant amounts of antioxidants.Īntioxidants protect the body from oxidative stress, which can damage cell structure and promote aging, cancer and heart disease ( 4, 5). Additionally, they have a high content of omega-6 and omega-9 fatty acids. Summary Hazelnuts are a rich source of vitamins and minerals like vitamin E, manganese and copper. However, hazelnuts contain phytic acid, which has been shown to impair the absorption of some minerals, like iron and zinc, from the nuts ( 3). Hazelnuts also contain decent amounts of vitamin B6, folate, phosphorus, potassium and zinc.Īdditionally, they are a rich source of mono- and polyunsaturated fats and contain a good amount of omega-6 and omega-9 fatty acids, such as oleic acid ( 1, 2).įurthermore, a one-ounce serving provides 2.7 grams of dietary fiber, which accounts for about 11% of the DV ( 1). One ounce (28 grams, or about 20 whole kernels) of hazelnuts contains ( 1): Although they are high in calories, they are loaded with nutrients and healthy fats. In 1989, the Oregon legislature named the hazelnut the Oregon state nut.Hazelnuts have a great nutrient profile. From 2004 through 2008, the average farm-gate price that Oregon farmers received for their hazelnuts-that is, the value of the nuts when they left the farm-was $60 million. In 2008, 650 farm families in Oregon, many multi-generational, grew hazelnuts on 30,100 acres and produced 32,000 tons of nuts. The nonprofit, working ranch is still in production. The oldest Oregon hazelnut orchard, Dorris Ranch, was planted in 1903 near Eugene. Oregon hazelnuts are in demand throughout the world because of their high quality and large size. They are washed, dried, and sold in the shell or cracked and sold as kernels. Nuts fall from the trees in September and are mechanically harvested from clean orchard floors. Hazelnut trees are unusual in that they pollinate during winter, when their catkins (flowering stems) elongate and pollen travels by wind to tiny red flowers on the branches. Varieties of hazelnut, chosen by farmers according to the trees’ ability to pollinate one another, are planted in evenly spaced rows. The Willamette Valley, with its fertile soil and mild climate, is now home to 99.9 percent of the U.S. avellana L., which settlers brought to Oregon Territory from England and France in the 1850s, became the genesis of the hazelnut industry in Oregon. californica grows wild in the state and is now planted for erosion control and wildlife habitat. Hazelnuts, also called filberts, have provided food for Indigenous peoples in the Northern Hemisphere since the glacial age.
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