Matrixyl 3000

A synthetic 13-amino acid analog of alpha-melanocyte-stimulating hormone (alpha-MSH) with a substitution of norleucine at position 4 that confers enhanced potency and enzymatic stability. Afamelanotide activates melanocortin-1 receptors (MC1R) on melanocytes, stimulating eumelanin production independent of UV exposure. The resulting increase in skin eumelanin provides photoprotection by absorbing UV radiation and scavenging reactive oxygen species.

Argireline is a synthetic six amino acid peptide (Ac-Glu-Glu-Met-Gln-Arg-Arg-NH2) designed to attenuate neurotransmitter release at the neuromuscular junction. It functions as a competitive inhibitor of the SNARE complex, reducing catecholamine release and potentially diminishing muscle contraction intensity in facial expression muscles. This mechanism provides a topical alternative rationale to botulinum toxin for addressing expression lines, though with markedly lower potency.

Matrixyl is a lipopeptide composed of a pentapeptide sequence (Lys-Thr-Thr-Lys-Ser) attached to a palmitic acid moiety to enhance dermal penetration. It is proposed to stimulate fibroblast activity and upregulate synthesis of extracellular matrix components including collagen types I and III, fibronectin, and hyaluronic acid. The peptide serves as a matrikine fragment mimetic, signaling tissue remodeling pathways in aged or photodamaged skin.

Palmitoyl tripeptide-38 is a synthetic lipopeptide designed to stimulate synthesis of six major constituents of the dermal matrix: collagen I, III, and IV, fibronectin, hyaluronic acid, and laminin 5. It is proposed to activate transforming growth factor beta (TGF-beta) signaling in fibroblasts, thereby promoting coordinated extracellular matrix assembly. The palmitic acid conjugate enhances dermal bioavailability when applied topically.