The purpose of present study was to evaluate the sun protection factor (SPF) of methanolic extract of flowers and leaves of Azadirachta indica by ultraviolet (UV) spectroscopy method. Methanolic extract of flowers and leaves of Azadirachta indica having concentration 200μg/ml were prepared and the SPF values were evaluated by UV spectroscopy. In this study, it was found that methanolic extract of leaves of Azadirachta indica have SPF value about 1.47658±0.006748 and methanolic extract of flowers of Azadirachta indica have SPF value about 1.3565±0.010351. So, it shows that the methanolic extract of flowers and leaves of Azadirachta indica may absorb the UV radiation and possess good sun protection activity against UV radiation. These results show that active components responsible for ultraviolet absorption may be isolated from plant Azadirachta indica and used in sunscreens to give better protection against sun.
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