Science
Mechanism of Action
The fermentation process with *Lactobacillus* bacteria specifically enhances the efficacy of the pumpkin's inherent enzymes, vitamins (like A and C), and potent antioxidants. This extract works as a gentle exfoliant, promoting a refined skin surface and improved tone by facilitating regular cell turnover and deep pore cleansing, breaking down excess oils and impurities without inducing irritation. Its rich antioxidant profile protects the skin from environmental stressors. Furthermore, it supports a balanced skin microflora, reinforcing the natural barrier function and contributing to enhanced hydration while mitigating congestion. In vitro studies indicate that *Lactobacillus* ferments also demonstrate anti-aging capabilities through the inhibition of collagenase, elastase, and hyaluronidase enzymes, alongside anti-inflammatory properties achieved by modulating cytokine levels, specifically IL-6 and IL-1β. These actions collectively aid in brightening the complexion and minimizing the appearance of fine lines and wrinkles.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 In vitro studies show that specific *Lactobacillus* ferments, including *L. paracasei*, *L. fermentum*, and *L. rhamnosus*, effectively stimulated HaCaT keratinocyte cell viability. For instance, *L. paracasei* ferment at 50 µg/mL elevated metabolic activity to 135%, while *L. rhamnosus* ferment at 500 µg/mL increased viability by up to 119%.
- 02 Kombucha ferment derived from pumpkin peel, at 0.1% concentration, demonstrated significant cytoprotective effects by increasing HaCaT keratinocyte cell viability to 125.14%. Similarly, *Lactobacillus plantarum* bacteria and kombucha ferments from pumpkin pulp at 0.1% concentration promoted keratinocyte proliferation in vitro.
- 03 *Lactobacillus* ferments, at concentrations ranging from 125 to 500 µg/mL, exhibited anti-aging effects by inhibiting key enzymes such as collagenase, elastase, and hyaluronidase. Furthermore, these ferments showed anti-inflammatory properties by significantly influencing IL-6 and IL-1β cytokine levels in both HaCaT keratinocytes and HDF fibroblasts in vitro.
Transparency
Dusting Analysis
Given the wide array of scientifically supported benefits, including gentle exfoliation, antioxidant protection, anti-aging, and anti-inflammatory properties, this ingredient is unlikely to be 'dusted' at minimal, ineffective concentrations. Its multifunctional profile provides substantial value across various skincare formulations.
The Formula
Formulation
Stability
The inherent pH of the fermented pumpkin product often falls within a slightly acidic range, typically around 4.0-4.2. For broader cosmetic formulations, a pH environment between 3.0 and 7.0 is suggested for optimal stability of related *Lactobacillus* ferments.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that related *Lactobacillus* ferment ingredients are safe for cosmetic use. While generally well-tolerated and recognized as a skincare ingredient, individuals with particularly sensitive skin or known allergies to pumpkins should exercise caution and perform an allergy patch test prior to widespread application. Products carrying the EWG VERIFIED™ seal typically require additional robust substantiation to include this ingredient.
Your Skin
Skin Compatibility
Our Assessment
Verdict
LACTOBACILLUS/CURCURBITA PEPO FRUIT FERMENT EXTRACT is a valuable multifunctional ingredient, offering scientifically supported benefits in gentle exfoliation, cell renewal, antioxidant protection, and anti-aging/anti-inflammatory actions, suitable for a broad range of skin types.
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