Peptides investigated in dermal biology, structural protein signaling, and melanocortin receptor research. This collection includes GHK-Cu (copper tripeptide), epithalon (epitalon), PT-141 (bremelanotide), kisspeptin-10, oxytocin acetate, and melanotan I. These compounds serve as research tools across multiple domains including extracellular matrix signaling, telomerase pathway investigation, and melanocortin receptor characterization. All products are mannitol-free, supplied in sealed research vials, and shipped from European stock with full analytical documentation.