Science
Mechanism of Action
This extract exerts its powerful antioxidant effects through DPPH and ABTS+ radical scavenging, a result of its rich composition of polyphenols and flavonoids, notably hesperidin. It promotes skin brightening by inhibiting tyrosinase activity. Anti-aging properties are observed through the inhibition of matrix metalloproteinase-1 (MMP-1) and enhanced collagen biosynthesis, especially in its fermented form. Furthermore, it offers significant anti-inflammatory and soothing actions by suppressing inflammatory cytokines (TARC, MCP-1, IL-6, IL-8) and chemokines, blocking phosphorylation pathways (ERK1/2, JNK, P38, MAPK), and preventing the nuclear translocation of NF-κB. It also strengthens the skin barrier by restoring the expression of critical proteins such as filaggrin and loricrin.
Research
Clinical Evidence
Medium confidence1-4%
Key findings
- 01 In a DNCB-induced atopic dermatitis mouse model, oral administration (100-500 µg/kg) substantially decreased skin severity, epidermal thickening, inflammatory cell infiltration, and serum IgE levels. It also successfully restored filaggrin and loricrin expression, indicating significant anti-inflammatory and skin barrier recovery benefits.
- 02 The extract (1 µg/mL to 4 mg/mL) dose-dependently suppressed IgE production in U266B1 human myeloma cells. Topical application dramatically reduced chemically elevated blood IgE concentrations in an allergic mouse model.
- 03 In-vitro analysis revealed electron donating abilities exceeding 50% at 0.5 mg/mL, confirming strong antioxidant activity. Tyrosinase inhibitory activity was measured at 23.23% at 2.0 mg/mL, supporting its role in skin brightening.
- 04 Industry suppliers recommend topical usage levels between 1% and 4% to harness its anti-aging and skin-soothing properties, primarily attributed to its antioxidant content.
Transparency
Dusting Analysis
No data available in the provided research to suggest this ingredient is commonly dusted.
The Formula
Formulation
Stability
Observations indicate a decline in stability over prolonged storage in cleansing formulations, leading to changes in pH and viscosity under varying temperature conditions. The extract contains fragrant compounds like limonene, which can become pro-oxidant when exposed to air, suggesting the necessity for stable packaging and potentially co-formulation with additional antioxidants to optimize long-term stability and efficacy.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has deemed 'Citrus fruit-derived ingredients,' including Poncirus Trifoliata Fruit Extract, safe for use in both rinse-off and leave-on cosmetic products, provided they are formulated to be non-sensitizing and non-irritating. For leave-on applications, products must not exceed 0.0015% (15 ppm) of 5-methoxypsoralen (5-MOP), a restriction aimed at preventing phototoxicity from furocoumarins. The FDA generally recognizes citrus fruits and certain extracts as safe (GRAS) for food use. No specific SCCS status was found for this ingredient.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Poncirus Trifoliata Fruit Extract is a valuable, multi-functional ingredient that offers significant antioxidant, anti-inflammatory, skin barrier support, and brightening benefits, making it suitable for a wide array of skin types and product formulations.
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