Fitriyana Fitriyana, Anna Fitriawati, & Annie Rahmatillah. (2026). Physical Quality Test And Antibacterial Activity Of Anti-Acne Cream Preparation Of Neem Leaf Extract (Azadirachta Indica A.Juss) Against Propionibacterium Acnes. International Journal of Health Engineering and Technology, 5(1). https://doi.org/10.55227/ijhet.v5i1.675