Saputri Nst SE, Wira Noviana Suhery, Deni Anggraini. FORMULATION AND CHARACTERIZATION OF CERAMIDE NANOEMULGEL LIP SERUM: OPTIMIZATION USING RESPONSE SURFACE METHODOLOGY. JPFI [Internet]. 2026 Jun. 17 [cited 2026 Aug. 17];15(1):34-41. Available from: https://ejournal.stifar-riau.ac.id/index.php/jpfi/article/view/2250