short–term exposure to electromagnetic fields generated by mobile phone jammers decreases the fasting blood sugar in adult male rats

background : substantial evidence indicates that exposure to electromagnetic fields (emf) above certain levels can affect human health through triggering some biological responses. according to who, short-term exposure to emf at the levels present in the home/environment do not cause any apparent detrimental effects in healthy individuals. however, now, there is a debate on whether long-term exposure to low level emf can evoke detrimental biological responses. although based on the communications act of 1934, selling, advertising, using, or importing mobile jammers which block cell phone calls and text messages are illegal acts, in some countries these devices are being used for security purpose and for prevention of cheating during examinations. methods:  in this study 30 male wistar rats were randomly divided into 3 groups of 10 each. the control group received no radiation. the sham exposure group was exposed to a switched-off jammer device. after fasting for 12 hours, the exposure group was exposed to emfs at a distance of 50 cm from the jammer. blood samples were collected from the tail vein after 24, 48 and72 hours and fasting blood sugar was measured by using a common blood glucose monitor (bionime gm110, taiwan). the significance level was considered 5% and spss ver. 21 was used for statistical analysis. the data were analyzed by anova followed by tukey's test. results:  a statistically significant difference was observed between blood sugar level in the control and exposure groups after 24, 48 and 72 hours of continuous irradiation (p values were < 0.001, < 0.001 and 0.002, respectively). no significant difference was found between the level of fasting blood sugar in control and sham groups.   conclusion:  short-term exposure to electromagnetic field generated by mobile phone jammer can reduce blood sugar level in adult male rats. these findings, in contrast with our previous results, lead us to this conclusion that the use of these signal blocking devices in very specific circumstances may have some therapeutic effects. however, further studies have to be performed to find out the exact mechanism by which jammer emfs reduce fasting blood sugar.