Science
Mechanism of Action
Kaffir lime extracts are rich in phenolic and flavonoid compounds. These act as potent antioxidants, mitigating oxidative stress and contributing to visible anti-aging effects. They also exhibit anti-inflammatory properties, help control acne-causing bacteria like Propionibacterium acnes and Staphylococcus aureus, and possess antifungal activity against organisms such as Candida albicans and Malasseia furfur. Furthermore, the extract can inhibit tyrosinase for skin brightening and reduce enzymatic degradation of collagenase, elastase, and hyaluronidase enzymes, suggesting comprehensive anti-aging benefits. Promotion of keratinocyte and fibroblast migration may support wound healing, while astringent qualities can refine pores and manage excess sebum. Fermentation is anticipated to amplify these benefits.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Citrus extracts generally function optimally in an acidic pH range, with some Kaffir lime solutions noted between pH 4 and 5, and citrus pectins stable between pH 3 and 6. Direct stability data for this specific ferment filtrate is limited.
Conflicts
- Incompatible with formulations that do not rigorously account for potential phototoxicity from 5-methoxypsoralen (5-MOP) in sun-exposed leave-on products, especially in combination with other phototoxic ingredients. Total 5-MOP levels must not exceed 0.0015%.
Safety
Safety Profile
Citrus fruit-derived ingredients, including Citrus hystrix, are deemed safe for use in rinse-off and leave-on cosmetic products when formulated to be non-sensitizing and non-irritating. For leave-on products applied to skin exposed to sunshine, the total level of 5-methoxypsoralen (5-MOP, bergapten) should not exceed 0.0015% (15 ppm) due to potential phototoxicity. Additive effects of multiple phototoxic ingredients must be considered, and use levels reduced accordingly to prevent adverse reactions.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This fermented Kaffir lime derivative offers a promising spectrum of antioxidant, anti-inflammatory, and anti-aging benefits for the skin, provided rigorous adherence to phototoxicity restrictions is maintained during formulation.
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