Figure 4.
Plasma insulin levels following the ingestion of glucose (black circles), glutamine (white circles) and water (black squares) in (A) LEAN (n = 8) (B) OB-CON (n = 8) and (C) OB-DIAB (n = 8) subjects. (D) Insulin area under the curve (AUC) following the ingestion of glucose (black bars), glutamine (white bars) and water (grey bars) in the three study groups. Data are geometric mean (1 SE range). *P < 0.05, †P < 0.01 and ‡P < 0.001 vs water (paired t-test). There were no differences in baseline insulin levels within each group between visits.