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. 2015 Mar 3;4:e9. doi: 10.1017/jns.2014.71

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© The Author(s) 2015

The online version of this article is published within an Open Access environment subject to the conditions of the Creative Commons Attribution-NonCommercial-ShareAlike licence <http://creativecommons.org/licenses/by-nc-sa/3.0/>. The written permission of Cambridge University Press must be obtained for commercial re-use.

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Fig. 5. — Effects of coffee polyphenol extract (CPE) on glucose (A), insulin (B), active glucagon-like peptide-1 (GLP-1) (C) and glucose-dependent insulinotropic polypeptide (GIP) (D) concentrations in the portal blood of C57BL/6J mice 10 min after gastric administration. Effects of CPE on glucose (E), insulin (F), active GLP-1 (G) and GIP (H) concentrations in the portal blood of C57BL/6J mice 30 min after gastric administration. Values are means (n 6–8 per group), with standard errors represented by vertical bars. Student's t tests after a preliminary F test of the homogeneity of within-group variance were used when comparing values between the groups. * Mean value was significantly different from that of the control (0 % CPE; –) group (P < 0·05; Student's t test). To convert glucose in mg/dl to mmol/l, multiply by 0·0555.