Nabila Jingga Permatasari, Tan ST. Efficacy of Topical Niacinamide on Skin Hydration of Adolescents with Acne Vulgaris: An Experimental Study on the Adolescent Community in Jakarta, Indonesia. Bioscmed. 2024;8(9):4987-4995. doi:10.37275/bsm.v8i9.1078