“…Due to the presence of abundant polyphenolic compounds, propolis extract (especially propolis ethanolic extract) has been widely used to develop active packaging films. As summarized in Table 2, different biopolymers, including gelatin (Bodini, Sobral, Favaro-Trindade, & Carvalho, 2013;Moreno et al, 2020), κ-carrageenan (Chang-Bravo, López-Córdoba, & Martino, 2014, starch (Costa, Druzian, Machado, de Souza, & Guimarães, 2014;de Araújo et al, 2015;Mironescu, Fratila, Hupert, & Mironescu, 2019;Mustafa et al, 2020;Suriyatem, Auras, Rachtanapun, & Rachtanapun, 2018;Villalobos et al, 2017), chitosan (Correa-Pacheco, Bautista-Baños, de Lorena Ramos-García, del Carmen Martínez-González, & Hernández-Romano, 2019;Shahbazi & Shavisi, 2018;Siripatrawan & Vitchayakitti, 2016), pullulan (Pobiega, Przybył, Żubernik, & Gniewosz, 2020), and alginate and agar (Juliano, Pala, & Cossu, 2007), are commonly selected as film matrix to carry active propolis extract. These nontoxic, renewable, and biodegradable biopolymers are isolated from natural resources and are considered as the alternatives to petroleum-based plastics (Mohamed, El-Sakhawy, & El-Sakhawy, 2020 F I G U R E 1 Scheme illustrates the development of active packaging films based on propolis extract by solvent casting method packaging films frequently possess good optical, barrier, and mechanical properties at low relative humidity (RH) conditions.…”