Formulation and Evaluation of Sunscreen for Photoprotection

Sunscreens play a crucial role in protecting human skin from the harmful effects of ultraviolet (UV) radiation. UV exposure is a major contributing factor to premature skin aging, hyperpigmentation, immune suppression, and an increased risk of skin cancer. The formulation of an effective sunscreen requires a careful selection of active and functional ingredients that provide broad-spectrum protection while maintaining skin compatibility and stability. This research focuses on the development and evaluation of a sunscreen formulation incorporating both organic and inorganic UV filters to ensure maximum efficacy. The formulation includes titanium dioxide, a well-known inorganic physical filter that reflects and scatters UV radiation, and additional stabilizing and skin-enhancing components such as ethylenediaminetetraacetic acid (EDTA), triglycerides, carbopol 40, and vitamin A. EDTA serves as a chelating agent, preventing oxidative degradation and enhancing formulation stability, while triglycerides contribute to the skin's hydration and smooth application. Carbopol 40 functions as a thickening agent, ensuring optimal consistency and ease of application. The inclusion of vitamin A provides additional skin benefits by supporting cellular regeneration and offering antioxidant protection. Various physicochemical tests and in vitro SPF determination, were conducted to assess the efficacy of the formulation. Spread ability and sensory evaluation confirmed the formulation's user-friendliness. The results indicate that the optimized formulation offers significant UV protection, good stability, and excellent skin compatibility, making it a potential candidate for commercial application.