Science
Mechanism of Action
This extract operates primarily as a powerful antioxidant, neutralizing free radicals and offering photoprotection against UV damage, which helps mitigate premature skin aging. Its anti-inflammatory capabilities reduce redness and irritation, promoting a calmer complexion. It enhances skin hydration and elasticity, soothing dry conditions and potentially stimulating collagen synthesis for improved firmness. Furthermore, it exhibits astringent, humectant, emollient, and antimicrobial effects, contributing to balanced sebum production, making it versatile for various skin concerns.
Research
Clinical Evidence
Medium confidence6%
Key findings
- 01 A clinical study demonstrated that topical application of 6% Camellia sinensis glycolic leaf extracts significantly increased immediate and long-term skin moisture, improved skin microrelief by reducing roughness, and enhanced skin viscoelasticity after 30 days. While this specific study utilized a glycolic extract, the mechanistic benefits are considered relevant due to shared active compounds.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
The stability of key beneficial catechins can be compromised at pH values exceeding 9, leading to degradation. Additionally, epimerization (a change in molecular structure) can occur at pH 6 and 7, potentially impacting efficacy. Higher temperatures and prolonged extraction periods also contribute to catechin oxidation and degradation.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel deemed general 'Camellia sinensis leaf-derived ingredients' safe when formulated to be non-sensitizing, specifically 'Camellia sinensis leaf extract' up to 0.86% in leave-on and 1% in rinse-off products. However, for 'Hydrolyzed Camellia Sinensis Leaf' specifically, the CIR Panel concluded 'insufficient data' for safety assessment, noting uncertainty if it should be included within the 'safe as used' category for leaf-derived ingredients, despite a post-meeting mention of it being 'safe' that was not reflected in the revised tentative report.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Hydrolyzed Camellia Sinensis Leaf Extract is a valuable ingredient offering significant antioxidant, anti-inflammatory, and hydrating benefits for all skin types, though its specific safety assessment by CIR is pending further data.
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