Table 1.

Area under the curve during an oral glucose tolerance test (mean ± SE) following ingestion of chlorogenic acid, decaffeinated coffee, trigonelline and placebo in 15 healthy overweight men.

	TOTAL GLP-1	INTACT GLP-1*	GIP
		(pmol/L × 120 min)
Placebo	1720 ± 180	83 ± 33	6984 ± 566**
Chlorogenic acid	1549 ± 178	140 ± 47	6656 ± 620
Decaffeinated coffee	1809 ± 152	66 ± 21	6725 ± 516
Trigonelline	1730 ± 160	94 ± 39	7512 ± 619

*Intact GLP-1 concentrations were very low and a substantial number was at the limit of detection and were reported as zero.

**n = 14 (1 missing value at time point 15 min.)