Halimatus Sa’diyah, Subekti, S. and Amin Alamsjah, M. 2025. Formulation of Gel Peel-Off Salt Mask with a Combination Sargassum duplicatum Extract Against Propionibacterium acnes. Journal of Marine and Coastal Science. 14, 2 (Jun. 2025), 115–128. DOI:https://doi.org/10.20473/jmcs.v14i2.72660.