Preparation and physicochemical characterisation of resveratrol–ovalbumin microparticles

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SummaryResveratrol (RES) is a phenolic compound which has many biological activities, but its poor stability and water solubility limit its function and application. This study developed microparticles (MPs) using ovalbumin (OVA) as a matrix to encapsulate RES. Encapsulation efficiency, solubility and structural characteristics have been evaluated. The antioxidant activity of encapsulated RES has also been examined using the methods of the 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2′-azinobis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) radical scavenging assays. Moreover, the stability of the MPs in simulated gastric and intestinal fluid has been studied. In conclusion, RES can be effectively encapsulated by OVA to form spherical MPs resulting in its high water solubility. RES–OVA MPs may not only keep the antioxidant activity of RES but also promote its stability. This kind of MPs can have a potential application in the formulation of functional soft drink based on RES.

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