<![CDATA[Background: Ultraviolet (UV) radiation is one of the environmental factors that can cause various skin disorders, including erythema, hyperpigmentation, premature skin aging, and tissue damage due to the formation of free radicals. One of the most effective approaches to preventing the harmful effects of UV exposure is the use of sunscreen. Moringa oleifera Lam. leaves are known to contain flavonoids, which act as antioxidants and possess the ability to absorb UV radiation, making them a promising natural active ingredient for sunscreen formulations. Purpose: To determine the effect of varying concentrations of bleached (Moringa oleifera L.) leaf extract in a sunscreen lotion formulation on the Sun Protection Factor (SPF) value and skin moisture, and to identify the optimal extract concentration. Method: This study employed a true experimental design using a Completely Randomized Design (CRD). Moringa leaf extract was obtained via ultrasonic extraction using 96% ethanol as the solvent, followed by a bleaching process using activated charcoal. The extract was formulated into lotions at concentrations of 7.5% (F1), 10% (F2), and 12.5% (F3), alongside a lotion base without extract serving as the control (F0). Testing included physical evaluation of the formulations, determination of SPF values using a UV-Vis spectrophotometer, skin moisture assessment using a skin analyzer, irritation testing, and statistical analysis using One-Way ANOVA. Results: Varying concentrations of bleached (Moringa oleifera L.) leaf extract in sunscreen lotion formulations significantly influenced SPF values and skin moisture (p<0.05). The average SPF values for F0, F1, F2, and F3 were 2.66, 4.80, 6.45, and 7.18, respectively. Formula F3, containing a 12.5% extract concentration, yielded the highest SPF value falling into the extra protection category and demonstrated the greatest improvement in skin moisture compared to the other formulas. All formulas met physical evaluation requirements regarding organoleptic properties, homogeneity, pH, spreadability, and adhesiveness, and caused no skin irritation. Conclusion: The formula with a 12.5% extract concentration is the optimal formulation, as it yields the highest SPF value and offers the best skin-moisturizing capability, thereby showing potential for development into an effective and safe natural sunscreen. Keywords: Moringa Leaves; Skin Moisture; Sun Protection Factor (SPF); Sunscreen Lotion.]]>
