Science
Mechanism of Action
Myricetin acts as a powerful antioxidant by directly scavenging free radicals and reducing overall oxidative stress. It further enhances the skin’s intrinsic defenses by increasing levels of endogenous antioxidants such as glutathione. Its anti-inflammatory properties stem from inhibiting crucial inflammatory pathways, including NF-κB and STAT1, which consequently reduces the production of pro-inflammatory mediators like TNF-α, IL-6, IL-1β, and IL-12. Additionally, myricetin provides photoprotection by shielding skin cells from UV-induced damage, inhibiting matrix metalloproteinases (enzymes responsible for collagen breakdown), and attenuating UVB-induced COX-2 expression, thereby supporting skin elasticity and potentially reducing wrinkle formation.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Myricetin demonstrates optimal stability at a pH of 2.0. It is prone to autooxidation and degradation when pH levels exceed 7.4. Its stability is significantly influenced by both temperature and pH.
Conflicts
- Basic substances: Due to its inherent weak acidic nature, myricetin is susceptible to degradation via autooxidation in highly alkaline environments.
- Certain metal salts: Specific metal salts, such as ferric chloride, can act as prooxidants in the presence of myricetin, particularly at a pH of 5.4.
Safety
Safety Profile
Comprehensive validation of myricetin's efficacy and safety for skin applications is limited by a lack of extensive, well-controlled human clinical trials. While free myricetin has shown cytotoxicity in certain in vitro models, advanced formulation strategies like nanofiber encapsulation have demonstrated the potential to reduce this cytotoxicity in HaCaT keratinocytes, suggesting enhanced safety through appropriate delivery systems. Rare instances of skin irritation have been noted as a potential side effect.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Myricetin is a valuable ingredient, demonstrating significant mechanistic potential across antioxidant, anti-inflammatory, and photoprotective domains; however, its clinical efficacy requires further rigorous human validation, and successful incorporation necessitates precise formulation to optimize stability and mitigate potential cytotoxicity.
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References
Sources