Formulation and Evaluation of Face Serum Using Guava Leaf Extract. International Journal of Research in Pharmacology & Pharmacotherapeutics, [S. l.], v. 14, n. 4, p. 776–781, 2025. DOI: 10.61096/ijrpp.v14.iss4.2025.776-781. Disponível em: https://ijrpp.com/ijrpp/article/view/762. Acesso em: 20 jan. 2026.