Science
Mechanism of Action
This ingredient functions as a primary natural UV filter, effectively absorbing UV-A and UV-B radiation with a peak around 334 nm and safely dissipating the energy as heat, preventing direct photodamage to DNA and proteins. At a cellular level, Porphyra 334 Oligopeptide-180 significantly suppresses UV-induced Reactive Oxygen Species (ROS) formation and limits lipid peroxidation. It also down-regulates key stress and photoaging pathways, including MAPK/AP-1 signaling and Matrix Metalloproteinase-1 (MMP-1) expression, which are critical for preserving collagen integrity. Furthermore, it stabilizes cell membranes, helps maintain redox homeostasis without pro-oxidant effects, and activates the cytoprotective Keap1-Nrf2 pathway.
Research
Clinical Evidence
High confidenceN/A
Key findings
- 01 In human skin fibroblasts, Porphyra-334 inhibits the production of Reactive Oxygen Species (ROS) and the expression of Matrix Metalloproteinases (MMPs) following UVA irradiation, demonstrating protective effects against UVA-induced photoaging.
- 02 Exhibits strong UV absorption at approximately 334 nm and effectively scavenges free radicals in DPPH and ABTS assays, typically with IC₅₀ values in the low-tens of micromolar range (e.g., 20-40 µM).
- 03 In UVB-irradiated mouse models, topical or oral administration significantly attenuated erythema, epidermal thickening, and oxidative stress markers, concurrently improving skin barrier parameters without observable toxicity.
- 04 A sunscreen cream containing 0.005% mycosporine-like amino acids (MAAs), which included Porphyra-334, neutralized UVA photodamage as efficiently as a cream formulated with 1% synthetic UVA and 4% UVB filters. Formulations with Porphyra-334 also showed comparable Sun Protection Factor (SPF) and UVB Biological Effective Protection Factors (BEPFs) to reference sunscreens, though UVA-BEPFs were slightly lower.
Transparency
Dusting Analysis
Insufficient data is available to assess the potential for dusting for PORPHYRA 334 OLIGOPEPTIDE-180.
The Formula
Formulation
Stability
Porphyra 334 Oligopeptide-180 maintains optimal stability in acidic environments, particularly between pH 3.5 and 4.5, but is susceptible to oxidation and instability in alkaline conditions. In liquid form, the pigment may deepen, especially at elevated temperatures. Recommended storage involves keeping it dry, dark, and refrigerated at 0-4°C for short terms or frozen at -20°C for long-term preservation. Its UV absorption wavelength shifts from 332 nm in highly acidic solutions (pH < 2) to 334 nm in alkaline solutions.
Conflicts
- Alkaline environments (unstable, prone to oxidation)
Safety
Safety Profile
Porphyra 334 is listed in the FDA Global Substance Registration System (GSRS) and registered as a natural cosmetic ingredient. Studies in UVB-irradiated mouse models reported 'without observable toxicity'. However, specific maximum concentrations for cosmetic use from regulatory bodies like CIR, SCCS, or FDA are not explicitly detailed in the provided research.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Porphyra 334 Oligopeptide-180 is a valuable, naturally derived photoprotectant and antioxidant, offering significant benefits in defending skin against UV-induced damage and premature aging while maintaining high skin compatibility.
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References
Sources