Fig. 4
From: Secretion of glucagon, GLP-1 and GIP may be affected by circadian rhythm in healthy males
Pearson’s correlation analyses between plasma glucose and A) plasma glucagon, B plasma GLP-1 and C) plasma GIP and correlations between plasma C-peptide and D) plasma GLP-1 and E) plasma GIP in 24 healthy males measured over 24 h. There were no statistically significant correlations between plasma glucose and glucagon, GLP-1 and GIP, respectively. A numerical negative correlation was borderline significant for plasma glucose and plasma glucagon. There were significant correlations between plasma concentrations of C-peptide and GLP-1 and GIP. Conc.: concentration, GLP-1: Glucagon-like peptide-1, GIP: glucose-dependent insulinotropic polypeptide