Aveleira, Avelinier, Avellana, Avellano, Cobnut, Corylus avellana, Corylus heterophylla, Coudrier, European Filbert, European Hazel, Haselnuss, Haselstrauch, Hazel, Hazel Nut, Noisetier, Noisetier Commun, Noisetier du Japon, Noisette, Noisettes.


Overview Information

Hazelnut is the nut from the hazel tree. People use it as medicine.

Hazelnut is used for high cholesterol, high levels of other fats (lipids) in the blood, heart disease, and obesity, but there is no good scientific research to support these uses.

People commonly eat hazelnuts as food.

How does it work?

Hazelnut contains oil, protein, and fiber. There isn't enough information to know how hazelnut might work for medicinal uses.


Uses & Effectiveness?

Possibly Ineffective for

  • Obesity. Eating hazelnuts doesn't seem to decrease body weight in people who are obese or overweight.

Insufficient Evidence for

  • Heart disease. Eating 1.5 ounces of nuts, such as hazelnuts, per day as part of a low-fat, low-cholesterol diet may help prevent heart disease. But research is limited.
  • High levels of cholesterol or other fats (lipids) in the blood (hyperlipidemia). An analysis of early research shows that eating hazelnuts might reduce low-density lipoprotein (LDL or "bad") cholesterol. But it doesn't seem to improve total cholesterol, high-density lipoprotein (HDL or "good") cholesterol, or triglyceride levels.
  • Heart disease.
  • High cholesterol.
  • Other conditions.
More evidence is needed to rate the effectiveness of hazelnut for these uses.

Side Effects

Side Effects & Safety

When taken by mouth: Hazelnut is LIKELY SAFE for most people in food amounts. But some people are allergic to hazelnuts and have had serious allergic reactions including life-threatening breathing problems (anaphylaxis). There isn't enough reliable information to know if hazelnut is safe when used as a medicine.

Special Precautions & Warnings:

Pregnancy and breast-feeding: Hazelnut is LIKELY SAFE when taken in amounts found in food, but there isn't enough reliable information to know if it's safe when taken by mouth in larger amounts that are used as medicine when pregnant or breast-feeding. Stay on the safe side and avoid use of larger amounts of hazelnut.

Allergies: People who are allergic to peanuts, cashews, walnuts, mugwort pollen, Brazil nut, birch pollen, and macadamia nut might also be allergic to hazelnut.



We currently have no information for HAZELNUT Interactions.



The appropriate dose of hazelnut depends on several factors such as the user's age, health, and several other conditions. At this time there is not enough scientific information to determine an appropriate range of doses for hazelnut. Keep in mind that natural products are not always necessarily safe and dosages can be important. Be sure to follow relevant directions on product labels and consult your pharmacist or physician or other healthcare professional before using.

View References


  • Asero R. Detection and clinical characterization of patients with oral allergy syndrome caused by stable allergens in Rosaceae and nuts. Ann Allergy Asthma Immunol 1999;83:377-83. View abstract.
  • Caballero T, Martin-Esteban M. Association between pollen hypersensitivity and edible vegetable allergy: a review. J Investig Allergol Clin Immunol 1998;8:6-16. View abstract.
  • Caballero T, Pascual C, Garcia-Ara MC, Ojeda JA, Martin-Esteban M. IgE crossreactivity between mugwort pollen (Artemisia vulgaris) and hazelnut (Abellana nux) in sera from patients with sensitivity to both extracts. Clin Exp Allergy 1997;27:1203-11. View abstract.
  • FDA. Qualified Health Claims: Letter of Enforcement Discretion - Nuts and Coronary Heart Disease (Docket No 02P-0505). July 2003. Available at: https://wayback.archive-it.org/7993/20171114183724/https://www.fda.gov/Food/IngredientsPackagingLabeling/LabelingNutrition/ucm072926.htm. Accessed on March 6, 2020.
  • Feldman EB. The scientific evidence for a beneficial health relationship between walnuts and coronary heart disease. J Nutr 2002;132:1062S-101S. View abstract.
  • Hu FB, Stampfer MJ. Nut consumption and risk of coronary heart disease: a review of epidemiologic evidence. Curr Atheroscler Rep 1999;1:204-9. View abstract.
  • Lima RPA, do Nascimento RAF, Luna RCP, et al. Effect of a diet containing folate and hazelnut oil capsule on the methylation level of the ADRB3 gene, lipid profile and oxidative stress in overweight or obese women. Clin Epigenetics 2017;9:110. View abstract.
  • Lutz M, Bonilla S, Concha J, et al. Effect of dietary oils, cholesterol and antioxidant vitamin supplementation on liver microsomal fluidity and xenobiotic-metabolizing enzymes in rats. Ann Nutr Metab 1998;42:350-9. View abstract.
  • Masthoff LJ, van Hoffen E, de Reus A, et al. Hazelnut allergy differs between children and adults in frequency of severity, aetiology and relevance of diagnostic parameters. Clin Exp Allergy 2014;44(12):1539-45. View abstract.
  • Masthoff LJ, van Hoffen E, Mattsson L, et al. Peanut allergy is common among hazelnut-sensitized subjects but is not primarily the result of IgE cross-reactivity. Allergy 2015;70(3):265-74. View abstract.
  • Munoz MF, Lopez-Cazana JM, Villas F, et al. Exercise-induced anaphylactic reaction to hazelnut. Allergy 1994;49:314-6. View abstract.
  • O'Mahony M, Mitchell E, Gilbert RJ, Hutchinson DN, et al. An outbreak of foodborne botulism associated with contaminated hazelnut yoghurt. (abstract) Epidemiol Infect 1990;104:389-95. View abstract.
  • Perna S, Giacosa A, Bonitta G, et al. Effects of hazelnut consumption on blood lipids and body weight: a systematic review and Bayesian meta-analysis. Nutrients 2016;8(12). pii: E747. View abstract.
  • Peroni DG, Dall'Agnola A, Piacentini GL, Boner AL. Worsening of atopic dermatitis by hazelnut essence contained in hydroxyzine syrup. Acta Paediatr 2007;96(11):1710. View abstract.
  • Pumphrey RS, Wilson PB, Faragher EB, Edwards SR. Specific immunoglobulin E to peanut, hazelnut and brazil nut 731 patients: similar patterns found at all ages. Clin Exp Allergy 1999;29:1256-9. View abstract.
  • Savage GP, McNeil DL. Chemical composition of hazelnuts (Corylus avellana) grown in New Zealand. Int J Food Sci Nutr 1998;49:199-203. View abstract.
  • Sutherland MF, O'Hehir RE, Czarny D, Suphioglu C. Macadamia nut anaphylaxis: demonstration of specific IgE reactivity and partial cross-reactivity with hazelnut. J Allergy Clin Immunol 1999;104:889-90.
  • Valcour A, Lidholm J, Borres MP, Hamilton RG. Sensitization profiles to hazelnut allergens across the United States. Ann Allergy Asthma Immunol 2019;122(1):111-6.e1. View abstract.

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CONDITIONS OF USE AND IMPORTANT INFORMATION: This information is meant to supplement, not replace advice from your doctor or healthcare provider and is not meant to cover all possible uses, precautions, interactions or adverse effects. This information may not fit your specific health circumstances. Never delay or disregard seeking professional medical advice from your doctor or other qualified health care provider because of something you have read on WebMD. You should always speak with your doctor or health care professional before you start, stop, or change any prescribed part of your health care plan or treatment and to determine what course of therapy is right for you.

This copyrighted material is provided by Natural Medicines Comprehensive Database Consumer Version. Information from this source is evidence-based and objective, and without commercial influence. For professional medical information on natural medicines, see Natural Medicines Comprehensive Database Professional Version.
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