Pharmaceutical composition comprising growth-hormone releasing peptide 6 (GHRP-6), tartrate buffer at pH 5.0-6.0, and trehalose as stabilizing agent, as well as the use of said composition for the manufacture of a medicament. The invention also provides a kit of parts comprising said pharmaceutical composition and a method of treatment of an individual in need thereof, which entails the administration of a therapeutically effective amount of the pharmaceutical composition comprising of GHRP-6, tartrate buffer at pH 5.0-6.0 and trehalose.