Selenium micro-encapsulation: Innovative strategies for supplementing plant-based beverages

Abstract

Selenium (Se) is an essential micronutrient for humans, and one of the new strategies to increase its intake is to fortify foodstuff with Se-bioaccessible species. This study aimed to produce Se-microparticles (selenate, selenite and Se-organic) using combined methods of microencapsulation; fortify commercial plant-based beverages (PBBs); evaluate the stability of microparticles; and estimate the bioaccessibility of Se and its contribution to the Recommended Daily Intake (RDA). Samples and bioaccessible fractions were submitted to acid digestion and Se levels (total and bioaccessible) were quantified by ICP-MS. The bioaccessibility of the Se-microparticles produced was estimated using an in vitro method under standardized conditions (INFOGEST). During the storage period, the microparticles maintained their stability and similar size. The PBBs fortified with Se-microparticles presented high bioaccessibility (77–94 %); being superior, in comparison, to the traditional fortification (Se-isolated salts). Thus, the results suggest promising perspectives for Se-supplementation in PBBs to meet nutritional needs effectively.