Science
Mechanism of Action
SH-DECAPEPTIDE-1 functions as a crucial signaling peptide, stimulating the skin's inherent repair processes. It actively promotes the synthesis of structural proteins like collagen and elastin, thereby improving skin elasticity and firmness, and fostering robust cell proliferation. SH-POLYPEPTIDE-9, a synthetic recombinant analog of human Vascular Endothelial Growth Factor A (VEGFA), enhances cell division and migration by increasing capillary vessel permeability to serum proteins. This leads to increased angiogenesis (new blood vessel formation), which profoundly improves microcirculation and optimizes the delivery of vital nutrients and oxygen to skin cells. Furthermore, it boosts protein production, facilitates cell restructuring, alleviates vascular spasms, activates monocyte migration, and safeguards endothelial cells from oxidative stress by reducing interleukin-1α (IL-1α). These combined actions support cellular rejuvenation, collagen maintenance, skin repair, and can also contribute to hair growth by restoring normal scalp microcirculation.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 At a 0.1% concentration, SH-DECAPEPTIDE-1 (referred to as Decapeptide) demonstrated superior efficacy compared to 0.1% betamethasone valerate in promoting re-pigmentation in vitiligo patients. A study reported significant re-pigmentation in 98% of patients, with 71% achieving a marked response (>75% re-pigmentation).
- 02 SH-POLYPEPTIDE-9 exhibited higher biological activity than Minoxidil in increasing Vascular Endothelial Growth Factor (VEGF) and stimulating basic Fibroblast Growth Factor (bFGF) release. It also boosted β-catenin production in human microvascular endothelial cells (HMVEC) co-cultured with follicle dermal papilla cells (FDPC) and provided protection against oxidative stress to the endothelium. The precise concentration for this observation was not specified but noted as being at lower doses compared to Minoxidil.
Transparency
Dusting Analysis
The provided research data does not offer sufficient information to establish common dusting practices or a specific dusting threshold for this peptide complex. A clinical study for SH-DECAPEPTIDE-1 reported efficacy at 0.1% for vitiligo re-pigmentation.
The Formula
Formulation
Stability
Peptide stability is highly sensitive to pH and temperature; peptide bond hydrolysis accelerates significantly outside a narrow pH range. Optimal stability and skin barrier compatibility are typically achieved in skincare formulations with a pH between 4.5 and 6.5. A pH below 5 can be problematic for peptides, and below 4 is highly likely to cause degradation. Furthermore, due to their molecular size, polypeptides may benefit from advanced delivery systems such as liposomes or nanoparticles to enhance their stability, skin penetration, and overall efficiency.
Conflicts
- Strong acids (e.g., hydrochloric acid) must be avoided as they can degrade peptides through acid hydrolysis.
- Direct acids, such as L-Ascorbic Acid, should be used with caution or in separate routines, particularly if the formulation's pH falls below 5, and certainly below 4, to prevent peptide breakdown.
- Individuals with psoriasis should avoid products containing SH-POLYPEPTIDE-9 due to its Vascular Endothelial Growth Factor A (VEGFA) activity.
- SH-POLYPEPTIDE-9 is not recommended for treating sunburn or after exposure to high doses of UV radiation.
Safety
Safety Profile
While SH-DECAPEPTIDE-1 and SH-POLYPEPTIDE-9 specifically have not been reviewed by the Cosmetic Ingredient Review (CIR), broader CIR reports on 'Tissue-Derived Proteins and Peptides' and 'Ectodermal-Derived Proteins and Peptides' generally conclude safety under current use practices. SH-DECAPEPTIDE-9 is rated as 'Teen SAFE', 'Baby SAFE', and 'Eyelid SAFE' by SkinSAFE, also being noted as 'Irritant Free' and 'Fragrance Free'. SH-POLYPEPTIDE-9 is not on EWG's Skin Deep Restricted or Unacceptable Lists and carries low concern ratings for cancer, allergies & immunotoxicity, developmental & reproductive toxicity, and use restrictions.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This synergistic peptide complex offers significant benefits for stimulating skin repair, enhancing microcirculation, and promoting cellular rejuvenation, making it a valuable asset in advanced skincare formulations.
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