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Palmitoyl Tetrapeptide-7
A lipopeptide used in cosmetic formulations to reduce inflammation-related skin aging by suppressing interleukin-6 secretion, often combined with Palmitoyl Oligopeptide.
Overview
Palmitoyl Tetrapeptide-7 is a synthetic lipopeptide consisting of four amino acids (glycine, glutamine, proline, and arginine) attached to a palmitic acid chain. The palmitoyl group enhances skin penetration by increasing lipophilicity, allowing the peptide to cross the stratum corneum more effectively than unmodified peptides. Originally known as Rigin, this peptide was developed as an anti-inflammatory cosmetic active ingredient.
The primary mechanism of Palmitoyl Tetrapeptide-7 involves the suppression of interleukin-6 (IL-6) production. IL-6 is a pro-inflammatory cytokine that increases with age and UV exposure, contributing to chronic low-grade inflammation in the skin known as "inflammaging." By reducing IL-6 levels, Palmitoyl Tetrapeptide-7 helps mitigate the inflammatory cascade that accelerates collagen degradation and extracellular matrix breakdown.
This peptide is most commonly found in combination with Palmitoyl Oligopeptide in the proprietary complex known as Matrixyl 3000. Clinical studies on this combination have shown improvements in wrinkle depth and skin firmness. The combination approach targets both inflammation reduction and collagen stimulation simultaneously, providing a dual mechanism for anti-aging benefits.
Palmitoyl Tetrapeptide-7 is widely used in anti-aging serums, eye creams, and moisturizers. It is generally well-tolerated and considered safe for cosmetic use, though as with all peptide-based cosmeceuticals, individual results may vary and the penetration of topically applied peptides through skin remains an area of ongoing research.