No significant difference in ZAG concentration could be demonstrated depending on gender (male vs female: 56 (33–126) vs 40 (31–100) μg/ml, P = 0.096) or diabetic status (non diabetes mellitus vs diabetes mellitus, 46 (33–115) vs 48 (27–110) μg/ml, P = 0.908). Here, AZGP1 is linked to diabetes mellitus.