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Effects of yam gruel on the levels of GLP-1 and PYY in serum. (a) GLP-1 levels of each group. (b) PYY levels of each group. Values are expressed as mean ± SD, n = 7 or 8. * P < 0.05 and ** P < 0.01 vs NC group, # P < 0.05 and ## P < 0.01 vs DM group.
