Spray-Drying Microencapsulation of Grape Pomace Extracts with Alginate-Based Coatings and Bioaccessibility of Phenolic Compounds.

ABSTRACT: Spray-drying is a common technique for the microencapsulation of bioactive compounds, which is crucial for improving their stability and bioavailability. In this study, the encapsulation efficiency (EE), physicochemical properties and in vitro bioaccessibility of phenolic compounds from spray-dried encapsulated phenol-rich extracts of grape pomace, a winery waste, were evaluated. Sodium alginate alone (SA) or in a mixture with gum Arabic (SA-GA) or gelatin (SA-GEL) was used as a coating. SA-GEL achieved the highest EE (95.90-98.01%) and outperformed the intestinal release of phenolics by achieving a bioaccessibility index (BI) for total phenolic compounds of 37.8-96.2%. The release mechanism of phenolics from the microcapsules adhered to Fickian diffusion. Encapsulatio

SUBMITTER: Martinovic J 

PROVIDER: S-EPMC11854297 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature