This study aims to investigate the effects of non-ionizing radiation emitted from mobile phone base station on some target group of children. Their thyroid-stimulating hormone (TSH) has been investigated taking into account the children were provided with possible protective olive oil supplement. The target group was composed of 120 children (6-12 years) and it was divided into three sets. The first group served as control group. The second group was exposed to electromagnetic field (EMF) alone, the third group was exposed to EMF and given 2.5 mL/day olive oil supplementation for 5 weeks. The second and the third groups lived nearby mobile phone base station (100-150 m) for more than 5 years. The thyroid-stimulating hormone (TSH) was assumed. EMF exposure caused decrease in TSH. Furthermore, this work presents a simulation study of electric fields, magnetic fields, power density and specific absorption rate (SAR) distribution in human thyroid tissue. Concerning numerical modeling, the power absorption and specific absorption rate in a thyroid tissue are generally computed using FDTD methods. Results show that electromagnetic radiation (EMR) from mobile phone penetrates the thyroid tissues and attenuates rapidly to reach zero at the inner of the tissue. The absorbent power and SAR show a maximum at the interface. [ABSTRACT FROM AUTHOR]