GCG and type 2 diabetes mellitus: In patients with T2D there was a pronounced initial increase in plasma glucagon within the first 30 minutes of the OGTT (glucagonfasting 18.38 ± 3.08, glucagon5min 22.23 ± 4.61, glucagon10min 22.90 ± 5.85, glucagon15min 23.70 ± 10.34 pmol/L).