لوسيون ضد آفتاب استاندارد هموسالات SPF تعيين روش برون تن مناسب براي اندازه گيري فاكتور حفاظتي در برابر نور خورشيد

Evaluation of in vitro methods for the determination of SUN PROTECTION FACTOR of the homosalte standard sunscreen lotion

Objective: Exposure to the sunlight can have harmful effects on the human skin; such as, skin cancers, hyperpigmentation and photoaging. Therefore, it is essential to use sunscreen products to prevent these adverse effects. The photoprotection provided by a sunscreen product is assessed in terms of its sun protection factor (SPF). There are in vivo and in vitro methods for the SPF determination. In vivo methods have some problems; therefore, in vitro methods are used more often. Materials and Methods: In this study we compared 3 in vitro methods for the determination of SPF of homosalte FDA standard sunscreen lotion. Results: The SPF of the homosalte standard lotion by the method of solution in ethanol was 8.23±0.13, by the method of solution in methanol method was 6.17±1.02 and by transpore tape method was 5.88±0.12.. Conclusion: According to these results and statistical tests, transpore tape was the best method.