Effect of microemulsion system on water dispersibility and bioavailability of γ-oryzanol

Abstract This study developed water-dispersible γ-oryzanol (WD-OZ) using microemulsion system and assessed their absorption in rats. While γ-oryzanol itself is hardly soluble in water, WD-OZ exhibited high water dispersibility, and γ-oryzanol, along with its metabolites, was detected in rat plasma. These findings provide a solid basis for future application of the microemulsion-based approach to enhance the bioavailability of γ-oryzanol in food.