(Pro3) GIP, human ((Pro3) Gastric Inhibitory Peptide, human) is an efficacious, stable and specific human GIP receptor (hGIPR) full agonist. (Pro3) GIP, human has high binding affinity for human GIPR with Ki/ Kd values of 0.90 nM. (Pro3) GIP, human can be used for the research of obesity-related diabetes.