Pengaruh Variasi Konsentrasi Asam Stearat Terhadap Stabilitas Fisik Sediaan Krim Tabir Surya Ekstrak Daun Sirih Hijau (Piper betle L.): The Effect Of Stearic Acid Concentration Variations On The Physical Stability Of Green Betel Leaf (Piper betle L.) Sunscreen Cream Preparations. jff. 2025;3(2):104-112. doi:10.35760/jff.2025.v3i2.137