Science
Mechanism of Action
Nacre powder exerts its effects through several biological pathways. It significantly stimulates fibroblast proliferation and migration, accelerating wound healing and promoting the regeneration of collagen types I and III, which are critical for enhancing skin structure and potentially reducing wrinkle appearance. Its components can also inhibit tyrosinase activity, an enzyme involved in melanin synthesis, thereby contributing to more luminous skin. Water-soluble elements within nacre foster angiogenesis and tissue regeneration in apoptotic and necrotic cell injuries, while nacre lipids facilitate the reconstitution of the stratum corneum's intercellular content, bolstering the skin barrier. The protein conchiolin, comprising 17 amino acids, is believed to contribute to skin hydration and collagen reconstruction. Additionally, nacre powder exhibits antioxidant properties, with ultra-nano and ultra-micro pearl powders showing enhanced free radical scavenging, and possesses anti-inflammatory benefits, possibly attributed to its magnesium content. Its anti-aging benefits include improved skin water content and potential activation of sirtuin1 and PGC-1α pathways.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 Pearl extract, at a concentration of 300 µg/mL, demonstrably increased fibroblast migration by three times and stimulated collagen type III mRNA expression in human fibroblast cells within an in vitro wound healing model.
- 02 Water-soluble pearl powder protein content, at 25 µg/mL, achieved the strongest migration capacity for L929 and MEF cells, indicating enhanced cellular proliferation and migration.
- 03 Nacre lipids facilitated the reconstitution of intercellular content within the stratum corneum of artificially dehydrated skin explants, suggesting a potential role in treating atopic dermatitis.
- 04 Water-soluble components triggered burn-induced granulation areas in porcine skin to rapidly fill with collagen, aiding in the reformation of natural skin appearance and promoting angiogenesis and regeneration in compromised cells.
- 05 Implanted nacre fostered improved skin tone, stimulated physiological functioning in skin fibroblasts, cultivated well-vascularized tissue, and enhanced extracellular matrix (ECM) production, including collagen types I and III and decorine, in rat dermis.
Transparency
Dusting Analysis
Nacre Powder is not typically considered a dusting ingredient, which are inactive fillers. It possesses distinct biological and physical functions, including stimulating collagen, enhancing luminosity, and providing physical exfoliation or opacifying effects, contributing actively to formulation efficacy.
The Formula
Formulation
Stability
For optimal stability, Nacre Powder formulations require a neutral pH range of 6.5–7.5. Although water-soluble, its limited solubility necessitates proper dispersion techniques for homogeneous integration. Particle size is critical: ultra-fine or micronized particles (1–10 µm) are preferred for delicate formulations like serums, primers, and products for sensitive skin, whereas coarser particles (20–50 µm) are not recommended for facial applications due to their potential abrasiveness. It is crucial to manage the processing of nacre powder, as alkaline residue could elevate the final product's pH, potentially leading to skin stimulation and disruption of the skin's acid-base balance.
Safety
Safety Profile
Nacre Powder has not undergone formal safety assessments by the Cosmetic Ingredient Review (CIR) or SCCS. It is not listed on EWG's Skin Deep Restricted or Unacceptable Lists and shows low concerns for cancer, allergies & immunotoxicity, developmental and reproductive toxicity, and use restrictions. A rare risk of allergenicity has been reported in individuals sensitive to shellfish proteins, though this is uncommon with topical application.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Nacre Powder is a valuable ingredient, demonstrated to stimulate collagen production, enhance skin luminosity, and support regeneration, while requiring precise formulation regarding pH and particle size for optimal efficacy and skin compatibility.
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References
Sources