Hariningsih, Y., Ma’arif, S., Nurhayati, S. and Khoiriyyah, J. 2026. Formulation and Efficacy Testing of Antioxidant Facial Serum Containing Gold Nanoparticles and Arabica Coffee Fruit Skin Extract (Coffea arabica L.) as an Anti-Aging Agent. MEDFARM: Jurnal Farmasi dan Kesehatan. 15, 1 (Jun. 2026), 282-295. DOI:https://doi.org/10.48191/medfarm.v15i1.773.