Hazel: benefits, dosage, contraindications

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The hazel is a tree or shrub of the Betulaceae family. It grows mainly in the temperate regions of the Northern Hemisphere. It has green, deciduous leaves. Its fruit, the hazelnut, is enclosed in protective bracts. The parts used in phytotherapy are the leaves, the buds (gemmotherapy) and its oil. Thanks to its high tannin content, the hazel (like its distant cousin witch hazel) is a venous tonic, very useful for circulation problems and associated symptoms such as heavy legs. In gemmotherapy, hazel is particularly recognized for its benefits on the lungs and the respiratory system. Hazel bud extract is recommended to combat pulmonary sclerosis and chronic respiratory diseases such as asthma, chronic bronchitis and bronchiectasis. The hazel bud is also used for its protective effects on the liver. It helps prevent the progression of liver diseases to sclerosis. The vegetable oil extracted from its hazelnuts, rich in monounsaturated fatty acids, is used for its nourishing and softening properties.

Other name(s) 

Hazel

Scientific name(s)

Corylus avellana

Family or group: 

Plants

Active ingredients:

Tannins

Indications

Scoring methodology

EFSA approval.

Several randomized, double-blind, controlled clinical trials (> 2), including a significant number of patients (>100), with consistently positive conclusions for the indication.
Several randomized, double-blind, controlled clinical trials (> 2), including a significant number of patients (>100), with positive conclusions for the indication.
One or more randomized studies, or several cohorts or epidemiological studies, with positive conclusions for the indication.
Clinical studies exist but are uncontrolled, with conclusions that may be positive or conflicting.
No clinical studies to date that can demonstrate the indication.

Cirrhosis
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The anti-sclerotic (anti-fibrotic) effect of hazel can be particularly beneficial for the liver, as it helps prevent or slow the development of hepatic fibrosis. Fibrosis is a process in which excessive connective tissue forms in the liver in response to chronic damage, such as that caused by hepatitis, alcoholism, or non-alcoholic fatty liver disease (NASH). This connective tissue can eventually progress to cirrhosis, a condition in which scar tissue replaces functional liver cells, impairing the liver's functions.

Posologie

posologieOral administration: buds

posologie15 drops

formulationgemmotherapy

Practical Guide to Family Gemmotherapy - Dr. MAX TETAU

Bronchitis
✪✪✪✪✪

Hazel in gemmotherapy is a lung remedy used for the following conditions: asthma, various allergies, bronchitis, and bronchial dilation to prevent sclerosis.

Posologie

posologieOral administration: buds

posologie15 drops

formulationgemmotherapy

Practical Guide to Family Gemmotherapy - Dr. MAX TETAU

Asthma
✪✪✪✪✪

In gemmotherapy, hazel buds are used for their beneficial effects on lung tissue, helping to reduce the frequency and severity of asthma attacks.

Posologie

posologieOral administration: buds

posologie15 drops

formulationgemmotherapy

Practical Guide to Family Gemmotherapy - Dr. MAX TETAU

Lymphedema
✪✪✪✪✪

Hazel is known for its effect on lymphatic circulation and is used to help reduce the symptoms of lymphedema by improving lymphatic flow.

Posologie

posologieOral administration: buds

posologie15 drops

formulationgemmotherapy

Practical Guide to Family Gemmotherapy - Dr. MAX TETAU

Skin health
✪✪✪✪✪

Hazel oil, rich in essential fatty acids, is applied to nourish the skin, promoting its regeneration and improving its elasticity and hydration.

Posologie

posologieBy mouth: fruit

formulationoil

Phytoextracts for Human Health from Raw and Roasted Hazelnuts and from Hazelnut Skin and Oil: A Narrative Review

Properties


Cardiovascular

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Laboratory research indicates that hazelnut extract, which contains antioxidant phenolic acids, inhibits LDL oxidation and can therefore theoretically reduce atherosclerosis.

Effects of Hazelnut Consumption on Blood Lipids and Body Weight: A Systematic Review and Bayesian Meta-Analysis
Antioxidant phytochemicals in hazelnut kernel (Corylus avellana L.) and hazelnut byproducts

Safe dosage

Adult: 15 drops - 100 drops

In 1D: 50 drops per day.

Precautions

Pregnant women: avoid

The use of gemmotherapy for pregnant and breastfeeding women is not recommended.

Children up to 3 years: avoid

The use of gemmotherapy for children under 3 years old is not recommended.

Breastfeeding women: avoid

The use of gemmotherapy for pregnant and breastfeeding women is not recommended.

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The information presented does not in any way replace medical treatment or the advice of a healthcare professional. Before taking any supplements, consult a healthcare professional, especially if you have a medical condition, are undergoing treatment, or are pregnant.