Science
Mechanism of Action
This extract functions at a cellular level by promoting fibroblast proliferation and enhancing the synthesis of collagen and intracellular fibronectin, crucial for improving the skin's tensile strength and accelerating healing. It modulates inflammation, minimizes the appearance of scars, and fortifies the skin barrier by encouraging ceramide production. Furthermore, it delivers powerful antioxidant effects, neutralizing free radicals, and exhibits antibacterial action against *Propionibacterium*. It also inhibits enzymes like metalloproteinase-1, hyaluronidase, and elastase, which contribute to extracellular matrix degradation and skin aging, and stimulates cellular detoxification processes such as autophagy and mitophagy.
Research
Clinical Evidence
High confidence0.5%
Key findings
- 01 An optimal concentration of 0.5% crude Centella asiatica extract demonstrated accelerated wound closure and increased collagen types II and III expression in mice, while also reducing TGFβ1, a pro-fibrotic cytokine. Higher concentrations were noted to potentially lead to undesired effects in this context.
- 02 A 5% concentration of Centella asiatica led to a notable improvement in skin's moisture content, although lower concentrations still provided significant soothing and antioxidant benefits.
- 03 Topical application of 0.1% madecassoside, a key component of Centella asiatica, when combined with 5% vitamin C, resulted in significant improvements in skin firmness, elasticity, and hydration in women aged 45-60 with photoaged skin over a six-month period.
Transparency
Dusting Analysis
Centella Asiatica Leaf Extract exhibits efficacy at concentrations as low as 0.05% for wound healing studies. While higher concentrations, such as 5%, have demonstrated specific benefits like improved skin moisture, the Cosmetic Ingredient Review (CIR) Expert Panel recommends concentrations up to 0.5% for leave-on facial products. Thus, for general leave-on facial applications, concentrations significantly exceeding 0.5% might be considered a 'red flag,' suggesting potential overuse without proportionally enhanced benefits or adherence to general cosmetic guidelines for the extract.
The Formula
Formulation
Stability
The extract maintains optimal stability and efficacy within a pH range of 4.5 to 6.5.
Synergies
- Vitamin C (specifically Madecassoside with Vitamin C for anti-aging and skin hydration)
Safety
Safety Profile
The CIR Expert Panel concludes that Centella asiatica extract and its derivatives are safe for cosmetic use at current concentrations, provided they are formulated to be non-sensitizing. It is considered non-comedogenic, non-toxic, and safe during pregnancy. While generally well-tolerated, rare instances of mild skin and eye irritation have been reported. A specific guinea pig study at a high 30% concentration classified it as a weak sensitizer, however, other studies, including 24-hour patch tests, confirmed non-irritation at typical cosmetic concentrations.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Centella Asiatica Leaf Extract is a highly valuable ingredient for its extensive benefits in skin repair, soothing, and protection across all skin types, demonstrating established efficacy at precise, low to moderate concentrations.
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References
Sources