Figure 1: Change in levels of plasma glucose (A), serum immunoreactive insulin (IRI) (B), serum immunoreactive C-peptide (CPR) (C) and plasma immunoreactive active GLP-1 like substances (active GLP-1 like substances) (D) before, 30 and 60 minutes after ingestion of a breakfast test meal (520- 560 kcal) in non-obese Japanese patients with type 2 diabetes (● ●, n=23) or non-obese control subjects with normal glucose tolerance (○ ○, n=13) following 10 hours of overnight fasting. The mean of BMI was not significantly different between groups.