Total glucose uptake for the entire small intestine, estimated by integrating uptakes from the duodenal, jejuna and distal regions. Open bars with different letter superscripts are significantly different (P < 0.05 by one-way ANOVA), suggesting that increasing radiation dose reduced uptake rate. Filled bars did not change with radiation dose, suggesting that consumption of the vitamin ACE-supplemented diet prevented the radiation-induced reduction in uptake. The filled bar with asterisk is significantly greater (P < 0.05 by one-way ANOVA) than the open bar at 10 Gy, suggesting that uptake was greater in tissues from vitamin-treated mice.