Science
Mechanism of Action
This high-performance peptide, also identified as Acetyl Tetrapeptide-33, primarily functions as an anti-inflammatory agent. It precisely reduces the release of inflammatory interleukins, specifically IL-6 and IL-8, which are typically activated by an overabundance of the antimicrobial peptide LL-37. This targeted action effectively mitigates cellular damage and the adverse effects of inflammatory processes. Furthermore, it provides a photoprotective benefit, reducing skin cell damage and inflammation induced by light exposure. As a peptide, Tetrapeptide-33 contributes to the skin's intrinsic capacity to produce vital proteins, including collagen. Its antioxidant properties inhibit oxidative stress, leading to a reduction in visible signs of aging, improvement in skin tone brightness, and overall skin conditioning through enhanced hydration and softness.
Research
Clinical Evidence
Low confidence0.1%
Key findings
- 01 A clinical study at 0.1% concentration demonstrated an increase in hair anchoring and stimulated natural growth of eyebrows and hair. This action effectively minimizes hair loss associated with aging, leading to thicker, smoother, firmer, and more natural hair and eyebrows.
Transparency
Dusting Analysis
Based on available data, there is no indication that Tetrapeptide-33 is commonly 'dusted' at sub-efficacious percentages for marketing purposes.
The Formula
Formulation
Stability
Peptides, including Acetyl Tetrapeptide-33, are generally sensitive to pH variations; significant shifts in pH can lead to peptide aggregation in reconstituted solutions. For optimal stability, it should be stored in a cool, dry, dark location within a tightly sealed container. The choice of peptide counter-ions, such as acetate over trifluoroacetate, can also impact stability and potential toxicity within cosmetic formulations.
Safety
Safety Profile
No specific safety assessments for Tetrapeptide-33 (Acetyl Tetrapeptide-33) have been found from major regulatory bodies such as the Cosmetic Ingredient Review (CIR), Scientific Committee on Consumer Safety (SCCS), or the U.S. Food and Drug Administration (FDA). While the CIR has reviewed other peptides, a dedicated evaluation for this specific ingredient is not currently available.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Tetrapeptide-33 is a valuable multi-functional peptide demonstrating robust mechanistic activity across anti-inflammatory, antioxidant, and hair growth pathways, though broader independent clinical validation and comprehensive safety reviews are still developing.
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