Insulin concentrations during IVGTT. Insulin concentrations during IVGTT of growing pigs which fed on control diet vs. 400 ppb Chromium (Cr) when being subjected to 8 d thermoneutral conditions (20°C) or heat stress conditions (35°C from 0900 h to 1700 h, and 28°C from 1700 h to 0900 h; n = 9 per group). Standard error of difference (SED) for insulin is 0.962 µU/mL. The P-values for the effects of temperature, diet, time, temperature × diet, temperature × time, diet × time, temperature × diet × time are 0.03, 0.43, < 0.001, 0.65, < 0.001, 0.65, and 0.98.