Matrixyl
Topical collagen-stimulating cosmetic peptide.
What it is
Matrixyl (palmitoyl pentapeptide-4, also called pal-KTTKS) is a cosmetic peptide consisting of a five-amino-acid sequence (Lys-Thr-Thr-Lys-Ser) attached to a palmitic acid molecule. The palmitoyl modification enhances the peptide’s lipophilicity and ability to penetrate the stratum corneum when applied topically. Matrixyl is one of the most widely used cosmetic peptides and is found in numerous skincare products.
Mechanism of action
Matrixyl is hypothesized to stimulate fibroblast collagen synthesis through signaling pathways activated by the pentapeptide sequence (which represents a fragment of pro-collagen). Topical application is intended to support skin remodeling, reduce fine lines, and improve skin texture.
Use as cosmetic ingredient
Matrixyl is formulated into topical skincare products at typical concentrations of 2–8%. It is not regulated as a pharmaceutical and is widely available in over-the-counter and professional skincare products.
Why this is out of scope at The Tide
The Tide is a peptide-focused medical clinic, not a skincare retailer or cosmetic dermatology practice. We do not formulate, sell, or recommend specific cosmetic skincare products. For topical cosmetic peptides:
- Work with a licensed dermatologist or aesthetician for evidence-based product selection
- Quality and concentration vary substantially across consumer products
- Independent reviews and dermatology publications can guide product selection
For clinical (rather than cosmetic) topical peptide applications, see our GHK-Cu entry, which we do prescribe for medical skin remodeling and post-procedure recovery indications.
Where to learn more
Dermatology providers and evidence-based skincare publications can guide selection of cosmetic peptide products.