Saputri Nst, Sandry Eka, Wira Noviana Suhery, and Deni Anggraini. 2026. “Formulation and Characterization of Ceramide Nanoemulgel Lip Serum: Optimization Using Response Surface Methodology ”. Jurnal Penelitian Farmasi Indonesia 15 (1):34-41. https://doi.org/10.51887/jpfi.v15i1.2250.