A multi-dosage, storage stable liquid human growth hormone formulation consisting essentially of growth hormone in isotonic phosphate buffered solution, a preservative and a non-ionic surfactant, wherein isotonicity of the phosphate buffered solution is provided by a compound selected from the group consisting of a neutral salt, a monosaccharide, a disaccharide, and a sugar alcohol, wherein the formulation has a pH of 6.15 to 6.5.