Angga Cipta Narsa et al. 2026. Effect of PVP K-30 Polymer Variation on Particle Size and Characteristics of Kratom Leaf Extract (Mitragyna speciosa K.) Nanosuspension. Jurnal Sains dan Kesehatan. 7, 3 (Sep. 2026), 52–60. DOI:https://doi.org/10.30872/.