Peptides for Skin Tightening: What Works and What Won’t (2026)
Short answer: peptides can make skin look firmer and smoother, but they can’t lift it the way surgery or energy-based treatments can. Three have the best evidence: Matrixyl (palmitoyl pentapeptide-4), GHK-Cu (copper peptides) and Argireline (acetyl hexapeptide-8). In trials they improved wrinkle depth, skin density or perceived firmness after 8 to 12 weeks of daily …