Lyophilized rbGHBP although stable at room temperature for 3 weeks, should be stored desiccated below -18 degree C. Upon reconstitution at > 0.1 rbGHBP mg/ml and filter sterilization hGHBP can be stored at 4 degree C for several weeks. At lower concentration addition of a carrier protein (0.1% HSA or BSA) is suggested. Please prevent freeze-thaw cycles.