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Moumoujus

CORYLUS AVELLANA LEAF WATER.

Insufficient Data CAS 84012-21-5 / FRAGRANCE, TONIC

Corylus Avellana Leaf Water, derived from hazelnut leaves, is a botanical ingredient recognized for its potent antioxidant, anti-inflammatory, and antimicrobial properties. It also offers astringent benefits, making it particularly suitable for oily and normal skin types.

Summary

skin conditioning antioxidant anti-inflammatory astringent antimicrobial

Science

Mechanism of Action

This ingredient functions through the action of powerful flavonols, such as quercetin and kaempferol, which are known for their antioxidant and anti-inflammatory capabilities. Quercetin aids in stabilizing mast cells, thereby reducing histamine release during allergic responses. The presence of tannins contributes astringent effects, assisting in wound contraction and minimizing exudation in minor skin lesions. Its anti-inflammatory mechanism is thought to involve the inhibition of COX-2 and NF-κB pathways. Rich in flavonoids and vitamins A, C, and E, it acts as an antioxidant by scavenging free radicals, protecting cells from oxidative stress and associated inflammation. Additionally, it exhibits antimicrobial activity.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 Studies indicate that an extract from Corylus avellana leaves demonstrates anti-inflammatory activity.
  2. 02 Hazel leaves extract has shown high antioxidant activity in a concentration-dependent manner, alongside antimicrobial capacity against Gram-positive bacteria.

Transparency

Dusting Analysis

Not commonly dusted

This ingredient is a liquid (leaf water) and therefore not typically subject to dusting analysis.

The Formula

Formulation

Solubility
Water
Optimal pH N/A
0 7 14

Stability

Specific optimal pH for Corylus Avellana Leaf Water stability in cosmetic formulations is not defined. The source plant thrives in a slightly acidic to neutral pH range (4.5-8.5, ideally 5-7). A related hazelnut skin hydroalcoholic extract demonstrated good physicochemical stability when incorporated at 0.2–2% w/w in oil-in-water emulsions, maintaining a dermocompatible pH of 4.7–5.5.

Safety

Safety Profile

CIR Status
Insufficient data
Sensitization risk High

The CIR Expert Panel found insufficient data to assess the safety of hazelnut leaf- and seed-derived ingredients for cosmetic use. There is a notable allergy risk for individuals sensitive to tree nuts, including hazelnuts, which could potentially induce contact dermatitis upon topical application. Cross-sensitivity between peanut and hazelnut proteins has been reported; however, the protein content of hazelnut leaf extract is currently unknown.

Your Skin

Skin Compatibility

Yes Normal
No Dry
Yes Oily
No Sensitive
Irritancy Unknown
Comedogenicity Unknown

Our Assessment

Verdict

Insufficient Data

While offering potential benefits such as antioxidant, anti-inflammatory, and astringent properties for oily and normal skin, the ingredient's safety profile is marked by insufficient data from the CIR Expert Panel and a high sensitization risk for individuals with tree nut allergies.

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