Microencapsulation of non-polar extracts of Colombian propolis via spray drying

Abstract

The oily extracts of propolis are matrices with a high antiradical, reducing, and antimicrobial properties. However, because of their susceptibility to oxidizing agents (oxygen and light) that react with the environment and negatively affect bioactivity and sensory properties, their use remains limited. Oily extracts of Colombian propolis (OECP) were microencapsulated (MOECP) by spray drying using maltodextrin and Gum arabic as the wall material and the conservation of active principles and the control of the release of bioactive components were evaluated. The formulations of MOECP with a higher concentration of propolis extract and lower drying temperature exhibited higher bioactivity because of less degradation of metabolites and less production of prooxidant substances. The samples exhibited a high antioxidant, antiradical, and antimicrobial potential. However, polyphenols and carotenoids were lost. Mixtures of maltodextrin and Gum arabic were suitable for microencapsulation and more than 50% of the phenols and carotenoids in MOECP were preserved.