The hazelnut is thefruitof thehazeland therefore includes any of the nuts deriving from species of the genusCorylus, especially the nuts of the speciesCorylus avellana. They are also known as cobnuts or filberts according to species. A cob is roughly spherical to oval, about 15–25 mm (5⁄8–1 in) long and 10–15 mm (3⁄8–5⁄8 in) in diameter, with an outer fibrous husk surrounding a smooth shell and a filbert is more elongated, being about twice as long as its diameter. The nut falls out of the husk when ripe, about seven to eight months after pollination. The kernel of theseedis edible and used raw or roasted, or ground into a paste. The seed has a thin, dark brown skin, which is sometimes removed before cooking.
Hazelnuts are packed with nutrients, including vitamins, minerals, antioxidant compounds and healthy fats. They may also have health benefits, including helping decrease blood fat levels, regulating blood pressure, reducing inflammation and improving blood sugar levels, among others. All in all, they are an excellent and delicious source of nutrients that can be easily incorporated into your diet.