Yogurt enrichment with sulfated alginate microcapsules containing garlic- and cardamom essential oils-loaded β-cyclodextrin: Investigating physicochemical and biological properties

Abstract

Side effects of synthetic food additives caused considerable concerns. In this context, natural substances such as essential oils (EOs) have received significant interest owing to their safety as well as anti-oxidant, anti-microbial, anti-cancer, anti-inflammatory, hypoglycemic, and some other biological properties. The purpose of this study was to use natural preservatives to determine the effect of sulfated alginate (S-Alg) microcapsules contaning cardamom (CEO)- and garlic (GEO) essential oils-loaded β-cyclodextrin (β-CD) on pathogenic and spoilage bacteria as well as anti-oxidant properties to increase shelf-life in yogurt. For this purpose, CEO and GEO were loaded into β-CD, and then encapsulated into S-Alg microparticles. The microcapsules containing CEO- and GEO-loaded β-CD were added to milk at three different concentrations (0.5, 1, and 1.5 % w/v) to prepare yogurt, and then anti-oxidant, pH, syneresis, sensory, and anti-bacterial properties of the resultant yogurt were evaluated during 21 days of storage. It was found that adding encapsulated CEO and GEO increased the shelf-life of yogurt and preserved its sensory and anti-bacterial properties during 21 days of storage compared to pure EOs.