KGF-1 vs Palmitoyl Pentapeptide-4

Binds FGFR2b (the KGF receptor), which is exclusively expressed on epithelial cells — providing tissue-specific action without mesenchymal effects. Activates RAS/MAPK and PI3K/Akt to promote keratinocyte proliferation and migration. Extends the anagen phase of the hair growth cycle.

A member of the fibroblast growth factor family that specifically and exclusively targets epithelial cells via FGFR2b. A potent stimulator of keratinocyte proliferation with applications in wound healing, hair follicle growth, and mucosal repair.

Binds TGF-β receptors on fibroblasts, upregulating collagen I, III, fibronectin, and hyaluronic acid synthesis. The palmitoyl chain provides lipophilicity for improved skin penetration into the dermis.

A lipopeptide consisting of a palmitoyl fatty acid attached to the pentapeptide KTTKS. A key component of Matrixyl 3000 formulations. Stimulates collagen and extracellular matrix production more potently than palmitoyl tripeptide-1 (Matrixyl) alone, particularly for deep wrinkle reduction.