Science
Mechanism of Action
This extract functions primarily as an antioxidant and skin conditioning agent. Specifically, aqueous preparations have shown a notable ability to scavenge reactive species such as superoxide anion and nitric oxide, which are implicated in inflammatory processes. Ethanolic extracts, while exhibiting anti-enzymatic activity against catalase and xanthine oxidase, also displayed higher cytotoxicity to normal human keratinocytes.
Research
Clinical Evidence
Low confidenceN/A
Key findings
- 01 In vitro investigations of aqueous Corylus cornuta twig extracts (synonymous with Corylus Rostrata twig extract) revealed high antiradical and antioxidant capacities. These extracts were particularly effective in neutralizing superoxide anion and nitric oxide, with minimal toxicity observed on normal human keratinocytes.
- 02 Ethanolic extracts of Corylus cornuta twigs demonstrated anti-enzymatic activity towards catalase and xanthine oxidase, but concurrently exhibited higher cytotoxicity to normal human keratinocytes compared to aqueous extracts.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
The method of extraction significantly influences the safety and efficacy profile; aqueous extracts of Corylus cornuta twigs demonstrate lower toxicity to normal human keratinocytes compared to ethanolic preparations, suggesting careful consideration of the extract type in formulation.
Safety
Safety Profile
The CIR Expert Panel has indicated insufficient data to determine the safety of related hazelnut leaf and seed extracts in cosmetics. While specific evaluation for twig extract is absent, this highlights a broader data gap for the Corylus genus. Food-related hazelnut allergies are documented by the FDA, but this pertains specifically to ingestible products and not topical cosmetic applications of the twig extract.
Your Skin
Skin Compatibility
Our Assessment
Verdict
While aqueous extracts demonstrate promising antioxidant properties with low cellular toxicity, further comprehensive safety and efficacy data are required for a definitive assessment of this ingredient in cosmetic formulations.
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