sh-Hexapeptide-44 SP is a single chain human peptide, produced synthetically to be identical to a portion of the protein, Bactericidal permeability-increasing protein, and contains alanine, arginine, glutamine, lysine and phenylalanine. sh-Hexapeptide-44 SP is included in the INCI database as a reference for the definition of other INCI Names, and might not be a marketed cosmetic ingredient.