Hazelnut bush

Authors: Prof. Dr. med. Peter Altmeyer, Prof. Dr. med. Martina Bacharach-Buhles

All authors of this article

Last updated on: 29.10.2020

Dieser Artikel auf Deutsch


Corylus avellana; Corylus avellana extract (INCI); Corylus avellana nut extract (INCI); Corylus avellana nut oil (INCI); general; hazel; Hazel; Hazel bush

This section has been translated automatically.

Plant species from the birch family (Betulaceae), colloquially also called hazel bush or hazelnut bush. It grows as a small tree or shrub and grows up to 6 m high. The hazelnut bears male and female inflorescences on the same plant (separate sexes) and is pollinated by the wind. The male flowers are the 4-8 cm long hanging catkins.

General information
This section has been translated automatically.

Corylus avellana is the parent plant of:

  • Folia Coryli avellanae(INCI name: Corylus avellana extract), the extract from the leaves of the hazel bush. Ingredients are 0.04% essential oil, taraxerol, beta-sitosterol.
  • Folia Coryli avellanae is used under the INCI name Corylus avellanae extract (INCI) in cosmetic products as a skin care product
  • Cortex Coryli avellanae is the extract from the bark of the hazel bush.
  • Oleum Coryli avellanae(INCI designation Corylus avellana nut oil), the hazelnut oil, is the fatty oil from the hazelnut kernels. It contains about 85% oleic acid glycerol ester and 10% palmitic acid glycerol ester.
  • Allergologically hazelnut allergens play an important role (see hazelnut allergy, see also tree pollen).

This section has been translated automatically.

Hazel bushes grow preferentially on the edges of forests, but also form hedges in fallow land. They need nutrient-rich, loamy soil and plenty of light. The hazelnut is common in the northern hemisphere with 15 species; in the Alps it can be found up to an altitude of 1800 m.

This section has been translated automatically.

The hazelnut is non-toxic. It does not count as a medicinal plant. The nuts have a high fat content (> 60%), contain proteins, calcium, iron and vitamins A, B1, B2 and C. As a foodstuff it is therefore, like all other nuts, of high health value.

This section has been translated automatically.

The species name "avellana" means "coming from Avellino" (Italy).

This section has been translated automatically.

  1. Etesamifar M, Wüthrich B (1998) IgE-mediated food allergies in 383 patients under consideration of the oral allergy syndrome Allergology 21: 451-457
  2. Fuhrman C et al (2007) Short-term effect of pollen exposure on antiallergic drug consumption. Ann Allergy Asthma Immunol 99: 225-231
  3. Hofer Th, Wüthrich B (1985) Food allergies. II. Frequency of organ manifestations and allergy-causing foods. Switzerland Med Weekly 115: 1437-1442

Outgoing links (2)

Hazelnut allergy; Tree pollen;