Science
Mechanism of Action
Porphyra Tenera Extract operates through several distinct pathways. It modulates immune responses and diminishes inflammation by regulating the NF-κB signaling pathway, prompting cytokine production, and bolstering macrophage activity. Its significant antioxidant capacity stems from a rich profile of polyphenols, flavonoids, porphyran, and porphyra-334, which act as potent radical scavengers and activate the Nrf2/Keap1 pathway. Mycosporine-like amino acids (MAAs), notably Porphyra-334 and shinorine, provide protection against UV-induced photodamage. Additionally, this extract exhibits hygroscopic properties, acting as a humectant to maintain skin hydration and smoothness, promotes cell renewal for revitalizing effects, and demonstrates antibacterial action against Propionibacterium acnes.
Research
Clinical Evidence
Medium confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
The extract contains water-soluble polysaccharides and is typically obtained using water or hydro-alcoholic solvents (e.g., 10-95% ethanol). No specific optimal pH range for its stability in cosmetic formulations has been identified.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) has classified Porphyra Tenera Extract as having 'insufficient data to determine safety' for topical application. However, Porphyra tenera is Generally Recognized As Safe (GRAS) by the U.S. FDA for use in food, suggesting a low systemic toxicity profile.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Porphyra Tenera Extract shows promising in vitro antioxidant, anti-inflammatory, and protective properties, yet further clinical studies are required to establish its full topical efficacy and safety profile.
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References
Sources