hyperglycemic
Twenty-three subjects categorized into four groups, normoglycemic lean (<i>n</i>= 6), normoglycemic obese (<i>n</i>= 6), obese with impaired glucose regulation (IGR;<i>n</i>= 6), and obese T2DM (<i>n</i>= 5), participated in a double-blind, randomized, crossover study involving a hyperglycemic clamp with a 240-min GIP infusion (2 pmol  kg<sup>-1</sup>  min<sup>-1</sup>) or normal saline.