Science
Mechanism of Action
The primary active component, polygodial, functions as a nonionic surfactant. It disrupts the permeability barrier of yeast cells, leading to cellular leakage and inhibiting microbial growth. Polygodial is also believed to permeate cells via passive diffusion, interacting with intracellular compounds, while simultaneously offering antioxidant and skin conditioning properties.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 Observed clinical improvement in women experiencing vaginal candidiasis and bacterial vaginosis with topical application. Notably, 35% of participants reported an initial sharp heat sensation.
- 02 Demonstrated strong, dose-dependent inhibition of Herpes Simplex-1 (HSV-1) virus, comparable to the efficacy of Acyclovir.
- 03 Exhibited strong inhibition of Candida albicans growth. In vitro tests also showed higher antifungal activity against T. mentagraphytes (Athlete's foot fungi) compared to other natural products.
- 04 Provided moderate antibacterial activity at 100-400 ug/ml (minimum bactericidal concentration) against gram-positive (e.g., Bacillus subtilis, Staphylococcus aureus) and gram-negative bacteria (e.g., Escherichia coli, Salmonella choleraesuis).
Transparency
Dusting Analysis
This ingredient possesses potent, specific biological activities and a known side effect profile, making it unsuitable for 'dusting' or inclusion without clear purpose and careful formulation.
The Formula
Formulation
Stability
The concentration and stability of polygodial, the primary active compound, can vary significantly based on factors such as harvesting, leaf processing, extraction methods, and formulation excipients. Its antifungal activity is notably enhanced under acidic conditions.
Safety
Safety Profile
Listed by the FDA's Voluntary Cosmetics Reporting Program as having 'No Reported Uses,' thus currently requiring no further action by CIR. However, future use would necessitate data for safety substantiation. Topical application is associated with a 'sharp heat sensation' in 35% of users. Not recommended for use during pregnancy, breastfeeding, or in children under 12 due to insufficient reliable safety data. Oral products have reported mild transient digestive side effects and skin rashes.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Pseudowintera Colorata Leaf Extract is a valuable ingredient for highly targeted precision skincare due to its potent, broad-spectrum antimicrobial efficacy, provided formulations carefully address the initial sharp heat sensation reported by a significant percentage of users and respect safety contraindications.
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References
Sources