BACKGROUND: Ultraviolet radiation can contribute to various damages to body organs especially to skin. However, the effect of Ultraviolet B on the function of viruses, immunologic changes and antioxidants levels which protect human skin health are still unknown. We aimed to find the harmful level of UVB that can be helpful in taking preventive action against the increasing depletion of Ozone layer
METHODS: In this cross-sectional study conducted in Isfahan population, two areas with high and low levels of UVB radiation were investigated based on the information obtained from Meteorological Office. Samples in each area were selected by a cluster-sampling method. 250 persons were assigned to each group. The antioxidant capacity and glutathione peroxide level of samples were measured. Data were analyzed with Student t test by using SPSS software