Hazelnut is the nut from the hazel tree (Corylus avellana). It is rich in monounsaturated fatty acids and is commonly eaten as food.

Hazelnut contains oil, protein, fiber, and antioxidants. The antioxidants in hazelnut might have heart health benefits.

People use hazelnut for obesity, high cholesterol, heart disease, dementia, and other purposes, but there is no good scientific evidence to support these uses.

Hazelnut is a tree nut. It is considered a major food allergen.
When taken by mouth: Hazelnut is commonly consumed in foods. It’s usually well-tolerated, but some people are allergic to hazelnuts. Serious allergic reactions are possible.

Special Precautions & Warnings:

Pregnancy and breast-feeding: Hazelnut is commonly consumed in foods. There isn’t enough reliable information to know if hazelnut is safe to use as medicine while pregnant or breast-feeding. Stay on the safe side and stick to food amounts.

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


NatMed Pro rates effectiveness based on scientific evidence according to the following scale: Effective, Likely Effective, Possibly Effective, Possibly Ineffective, Likely Ineffective, Ineffective, and Insufficient Evidence to Rate.
Likely effective Effectiveness definitions
Possibly effective Effectiveness definitions
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Possibly ineffective Effectiveness definitions
  • Obesity. Eating hazelnuts or taking hazelnut oil by mouth doesn't seem to decrease body weight in people who are obese or overweight.
There is interest in using hazelnut for a number of other purposes, but there isn’t enough reliable information to say whether it might be helpful.
Insufficient evidence Effectiveness definitions

Dosing & administration

Hazelnut is commonly consumed in moderate amounts as part of the diet.

As medicine, there isn’t enough reliable information to know what an appropriate dose of hazelnut might be. Speak with a healthcare provider before use.

Interactions with pharmaceuticals

It is not known if Hazelnut interacts with any medicines. Before taking Hazelnut, talk with your healthcare professional if you take any medications.

Interactions with herbs & supplements

There are no known interactions with herbs and supplements.

Interactions with foods

There are no known interactions with foods.
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