Preparation of a Highly Water-dispersible Powder Containing Hydrophobic Polyphenols Derived from Chrysanthemum Flower with Xanthine Oxidase-inhibitory Activity

Abstract

We aimed to develop a highly water-dispersible dry powder of hydrophobic polyphenols derived from chrysanthemum flower. A dry powder resulting from the mixture of an ethanolic extract of chrysanthemum flower (CF) with transglycosylated rutin (rutin-G) and sucrose fatty acid esters (SEs) was successfully formulated. This powder dispersed easily in water, and the mean particle size in water remained at ∼150 nm without apparent changes even after one-week storage. Furthermore, the particle size of the dispersed powder prepared by heat-and-acid treatment shifted below 100 nm after one-week storage. The xanthine oxidase-inhibitory activity of the resulting CF–rutin-G–SEs powder was almost equivalent to that of chrysanthemum flower oil according to in vitro analysis. This technique for preparing a highly water-dispersible dry powder from natural products containing hydrophobic polyphenols should be applicable to the development of functional food products.