Science
Mechanism of Action
Centella Asiatica Extract exerts its effects by stimulating fibroblast proliferation and increasing the production of collagen, specifically types I and III, alongside intracellular fibronectin. This action fortifies the skin's structural integrity and tensile strength. Its active compounds, such as madecassoside, possess potent anti-photoaging properties by inducing collagen expression. Furthermore, it calms irritation through anti-inflammatory effects, strengthens the skin's moisture barrier by boosting differentiation markers like involucrin and filaggrin, and exhibits antibacterial action against P. acnes, which aids in reducing acne-related inflammation. It also contributes to skin hydration by stimulating glycosaminoglycan and hyaluronic acid synthesis and provides antioxidant protection.
Research
Clinical Evidence
High confidence0.5%
Transparency
Dusting Analysis
While Centella Asiatica Extract exhibits efficacy even at low concentrations, such as 0.05% for wound healing, clinically impactful benefits like collagen stimulation (requiring 5%) or optimal overall performance (often observed around 0.5%) necessitate higher levels. Concentrations below 0.1% may offer only minimal soothing benefits, potentially indicating 'dusting' if significant functional claims are made without sufficient active ingredient.
The Formula
Formulation
Stability
Optimal stability is observed within a pH range of 4.5 to 7.5. While the extract is generally water-soluble, a titrated extract (TECA) may exhibit poor water solubility and could precipitate in formulations. The active compound madecassoside, however, is water-soluble.
Conflicts
- strong acids
- high concentrations of Vitamin C
- certain essential oils
- blood-thinning medications (requires professional consultation)
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel deems Centella Asiatica Extract safe for use in cosmetics, provided formulations are non-sensitizing. It is typically utilized at concentrations up to 0.5% in leave-on facial products. Although generally well-tolerated, occasional mild skin and eye irritation has been reported, and a 30% extract was categorized as a weak sensitizer in guinea pigs; however, allergic reactions are considered rare.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Centella Asiatica Extract is an essential multi-functional ingredient, expertly calming inflammation, reinforcing the skin barrier, and significantly boosting collagen production across all skin types.
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