Optimisation of Sucrose-Free Hard Candy Enriched with Piper retrofractum Vahl Extracts Using Response Surface Methodology (RSM). Tropical Journal of Natural Product Research , [S. l.], v. 9, n. 11, p. 5565 – 5570, 2025. DOI: 10.26538/tjnpr/v9i11.41. Disponível em: https://www.tjnpr.org/index.php/home/article/view/7830. Acesso em: 29 dec. 2025.