Incorporation of curcumin-loaded lipid-based nano delivery systems into food: release behavior in food simulants and a case study of application in a beverage

Abstract

Curcumin-loaded lipid-based nano delivery systems (nanoemulsions-NE, solid lipid nanoparticles-SLN and nanostructured lipid carriers-NLC) were subjected to different food simulants to evaluate curcumins in vitro release kinetics and particlés stability. The nano delivery systems were also incorporated into a model beverage and their physicochemical properties were evaluated during storing period. Curcumins bioaccessibility of beverages containing nano delivery systems were assessed through an in vitro digestion process. All nano delivery systems showed a higher curcumins release and lower particle stability at 50 % ethanol (lipophilic food simulant) comparatively to hydrophilic food simulants. NLC and SLN showed a good particles stability within the beverage during storing period, while NE presented high instability immediately after incorporation in the beverage. NLC and SLN did not affect beverages stability relatively to pH, however the beverage with NLC was slightly more stable regarding color. Beverage with SLN presented higher curcumin bioaccessibility compared to the beverage with NLC, however it showed lower curcumins stability.