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Hazelnut
Hazelnut Full Name
Hazelnut
Hazelnut Introduction
Hazelnuts, the fruit of plants in the genus Corylus of the birch family (Betulaceae), are renowned worldwide for their distinctive flavor and rich nutritional value. The European hazelnut (Corylus avellana) is the most widely cultivated and consumed commercial variety. Hazelnuts are a highly nutritionally dense food. The most notable characteristic is their high content of healthy fats, which account for approximately 60–70% of their total weight. Monounsaturated fatty acids (MUFAs) dominate this fat profile, particularly oleic acid, whose content is comparable to the primary fatty acid in olive oil. Scientific research has extensively confirmed that replacing saturated fats with monounsaturated fatty acids can significantly improve blood lipid profiles, specifically by reducing serum total cholesterol and LDL-C levels, while potentially maintaining or increasing HDL-C levels.
In addition to quality fats, hazelnuts are a good source of plant protein, providing about 15 grams of protein per 100 grams, offering essential amino acids for vegetarians and those seeking diverse protein sources. They are also rich in dietary fiber, which aids in promoting intestinal motility, maintaining gut microbiota health, and increasing satiety, having a positive impact on weight management and blood sugar control. In terms of micronutrients, hazelnuts also excel. They are an excellent source of vitamin E, particularly in the form of alpha-tocopherol, a potent fat-soluble antioxidant that protects cell membranes from oxidative damage caused by free radicals. Furthermore, hazelnuts are rich in various B vitamins, such as thiamine (B1) and vitamin B6, which play important roles in energy metabolism and nervous system function. Regarding minerals, hazelnuts are a valuable source of manganese, copper, magnesium, phosphorus, and iron.
Despite these nutritional benefits, hazelnuts pose a potential and, for some, life-threatening risk. They are one of the most common tree nut allergens globally, capable of triggering a wide spectrum of allergic reactions, ranging from mild oral discomfort to life-threatening systemic anaphylaxis. Hazelnuts contain several allergenic proteins, some of which share structural similarities with other plant allergens. A classic example is the Cor a 1 protein, which belongs to the PR-10 protein family along with Bet v 1, the major birch pollen allergen. Consequently, many individuals allergic to birch pollen may experience Oral Allergy Syndrome (OAS) after consuming raw hazelnuts, characterized by itching and mild swelling of the mouth, lips, and tongue.
Alternate Names for Hazelnut
Corylus avellana; Hazelnut
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