GCG and type 2 diabetes mellitus: The lowest AUC (mean) for glucagon was found in NG-NW (436.60 pmol/L), followed by IFG (547.62 pmol/L), NG-O (610.27 pmol/L), IGT+IFG (749.52 pmol/L), IGT (979.25 pmol/L) and T2D (1564.50 pmol/L).