Science
Mechanism of Action
Laetiporus sulphureus mycelium extract operates through several pathways to enhance skin health. Its rich content of phenolic compounds and polysaccharides provides robust antioxidant protection, neutralizing free radicals. For hyperpigmentation, it acts by inhibiting tyrosinase activity and subsequently reducing melanin synthesis. Furthermore, the extract demonstrates anti-inflammatory properties, likely due to specific exopolysaccharides, and exhibits selective antimicrobial activity against Gram-positive bacteria, including Staphylococcus aureus. It also shows potential to offer UV-protective benefits.
Research
Clinical Evidence
Medium confidence0.01%
Key findings
- 01 In zebrafish embryos, a concentration of 0.01% reduced melanin by 71%, with complete inhibition of melanocyte pigmentation observed at unspecified higher doses. These effects occurred without melanocytotoxic, inflammatory, or immunosuppressive responses.
- 02 In vitro antioxidant activity was dose-dependent, with DPPH radical scavenging ranging from 14% at 100 µg/ml to 86% at 800 µg/ml. It also demonstrated 57.4% inhibition in the β-carotene/linoleic acid system at 80 µg/ml, increasing to 82.2% at 160 µg/ml.
Transparency
Dusting Analysis
No specific data is available regarding the 'dusting' properties or thresholds for this ingredient in cosmetic formulations.
The Formula
Formulation
Stability
The optimal pH of 6-8 is noted for mycelial growth, not specifically for extract stability or efficacy in a cosmetic formulation. The pigment extract (laetiporic acid) showed limited long-term stability when exposed to oxygen and light, indicating optimal stability is achieved through storage in the dark at 4 °C under a nitrogen atmosphere.
Safety
Safety Profile
While not formally reviewed by CIR, SCCS, or FDA for cosmetic use, studies indicate a favorable toxicity profile. Extracts were not toxic to HTR-8/SVneo trophoblast cell lines at concentrations up to 10 mg/ml and demonstrated no melanocytotoxic, inflammatory, or immunosuppressive effects in zebrafish studies. Levels of potentially harmful microelements (As, Cd, Cr) in the fruiting bodies were found to be very low or undetectable.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Laetiporus Sulphureus Mycelium Extract is a valuable, multi-functional ingredient that offers significant antioxidant and skin brightening benefits, along with anti-inflammatory and potential antimicrobial properties, suitable for all skin types.
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References
Sources