Fig. 2

Post-prandial hormone concentrations during an oral glucose test in insulin-dysregulated ponies. The hormone concentrations were measured in16 ponies previously determined to be either severely insulin-dysregulated (SD) or not severely insulin-dysregulated (NSD). Measurements were taken after grazing either unfertilised (●), or fertilised (○), pasture for 4 h/day for 5 days (with an evening meal of hay). The insulin responses to each test (a) were lower, but more variable, in NSD ponies. While the SD group were consistently insulin-dysregulated across both tests, the NSD responses were more variable, and were sometimes above the OGT test cut-off (⃞) and sometimes below it. The blood glucose (b) plasma aGLP-1 (c) and plasma GIP (d) did not differ between groups after grazing either pasture and the variability across the two tests was similar