DEVELOPMENT, OPTIMIZATION, AND CHARACTERIZATION OF A MULTIFUNCTIONAL BROAD-SPECTRUM MINERAL SUNSCREEN STICK INCORPORATING NIACINAMIDE AND TOCOPHEROL FOR UV PROTECTION, SKIN-BRIGHTENING, AND SEBUM CONTROL. Biosci. Insights. 2026;3(01):466-477. Accessed November 12, 2026. https://biosciinsights.com/index.php/BI/article/view/67