Material and Methods: Male Wistar rats (n = 40) were allocated to four groups, a control group (n = 10) and three treatment groups (n = 30). The first treatment group received rosmarinic acid (5 mg/kg body weight) by gavage method, the second test group received rosmarinic acid (5mg/kg body weight) by gavage and electromagnetic field (EMF) exposure at 50 Hz for 42 consecutive days, whilst the third test group just received EMF exposure for 42 consecutive days respectively; however, control group received 5cc Normal saline (0.9% NaCl) daily by gavage method.

Results: In 42nd day of research, 5 cc blood was collected for testosterone level measurement from whole groups. The level of testosterone significantly increased in groups that received Rosmarinic acid (P<0.05).

Conclusion: Since in our study administration of 5mg/kg Rosmarinic acid significantly have increasing effect on decreased testosterone that is caused by EMF, it seems that using Rosmarinic acid as food additive can be efficient for supporting people living in EMF environmental pollution.