SS-31 (Elamipretide) is a high-purity synthetic tetrapeptide, with the sequence D-Arg-Dmt-Lys-Phe-NH2 (Dmt = 2′,6′-dimethyltyrosine), designed exclusively for laboratory research. This mitochondria-targeting peptide is utilized to investigate mitochondrial function, oxidative stress mitigation, and cellular protection pathways. Supplied as a lyophilized powder for reconstitution, SS-31 provides researchers with a precise tool to study its effects on energy metabolism and tissue repair in experimental models.