Abstract: The invention relates to injectable formulations of growth hormone comprising citrate as buffer substance. The formulation could be an aqueous solution of growth hormone and citrate as buffer substance in a concentration of 2-50 mM. The formulation of the growth hormone could comprise growth factor, amino acids such as e.g. glycine and alanine and/or mannitol or other sugar alcohols and/or glycerol and/or other carbohydrates and optionally a preservative such as benzyl alcohol. The invention also relates to a process for preparation of the formulation by mixing growth hormone with citrate as buffer substance or by adding the constituents of the final formulation on the last gel purification step.