After a 12 h fast, C57BL/6J mice were administered either insulin (Insulin) or saline control (Saline) IP as indicated. Social exploration was measured at 0, 0.75, 2, 4, and 8 h after insulin delivery. Unrestricted access to food was provided after the 0.75 time point. Results are expressed as percentages of the baseline measurement, means ± SEM; n=3, *P <0.05, **P <0.001 Insulin vs. Saline.