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Circulating serum insulin concentrations after 6 h without feed (A) and after exposure to feed ad libitum or 25% feed restriction for 6 h (B). For (A), we observed no differences (P > 0.15), based on ANOVA. For (B), we observed no effect of LH (P = 0.73) or feed (P = 0.43), but we did detect an effect of time (P < 0.0001) and an interaction of feed × time (P < 0.0001). †P < 0.15; *P < 0.05.
