There are more than 100 varieties of hazel trees, which are related to birch trees. Certain varieties of hazelnuts are called filberts, which are slightly larger than other hazelnuts.
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The information presented in the Food Guide is for informational purposes only and was created by a team of US–registered dietitians and food experts. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements, making dietary changes, or before making any changes in prescribed medications. Information expires December 2025.