Effects of stress on weight gain and food intake. C57 BL/6 mice were received stress procedure for 12 weeks. (A) Changes in body weight. White squares = control (n = 10), Black squares = stress (n = 10). (B) Food intake during the course of the stress stimulating. Error bars represent standard error (SE). *P < 0.05, **P < 0.01 versus control mice.