What is Palmitoyl Pentapeptide-4?
Palmitoyl Pentapeptide-4, also written as Pal-KTTKS, is the peptide behind the original Matrixyl ingredient, first introduced by Sederma in 2000. It is a five-amino-acid peptide chain attached to a fatty acid tail, which helps it penetrate skin more easily. It was one of the first peptides widely used in cosmetic anti-aging products and remains one of the most studied peptides in skincare.
Source
|
Found in |
Synthetic peptide (INCI name: Palmitoyl Pentapeptide-4, also called Palmitoyl Pentapeptide-3 in older literature) |
|
Origin |
Lab-made, derived from a fragment of pro-collagen I; the original ingredient sold under the trademark Matrixyl |
Top features and benefits
|
Studied for reducing the look of wrinkle depth |
Supports collagen production |
One of the most extensively researched cosmetic peptides |
|
Generally well tolerated |
Foundational ingredient behind later peptides like Matrixyl 3000 |
Suitable for daily use in serums and moisturizers |
How Does It Work?
Palmitoyl pentapeptide-4 works by mimicking a small fragment of collagen that is naturally released when skin remodels its own structure. This fragment signals fibroblasts, the cells that produce collagen, to increase their activity, which is the basis for its use as an anti-wrinkle ingredient.
In a well-known 12-week, double-blind, placebo-controlled clinical trial, a formulation containing this peptide showed a statistically significant reduction in the look of fine lines and wrinkles compared to a placebo, based on both technical image analysis and expert grading. A separate, smaller study applying it around the eye area over 28 days reported reductions in wrinkle depth, fold thickness, and skin rigidity.
Transparency note: Palmitoyl pentapeptide-4 has more independent clinical support than some newer peptides, including studies not funded by its original manufacturer. That said, its overall effect size is described in the research as modest rather than dramatic, and it works over a period of weeks to months rather than producing immediate results.