Double-layer coated microparticles and preparation thereof

Abstract

A double-layer coated microparticle for protecting a bioactive substance is provided. The double-layer coated microparticle comprises a core, an inner layer and an outer layer, wherein the core is coated with the inner layer and the outer layer, the inner layer is between the core and the outer layer, the core comprises the bioactive substance, the inner layer comprises a hydrophobic antioxidant, and the outer layer comprises a solid fat. Also provided is a method for preparing the double-layer coated microparticle. The preparation method comprises contacting the core with an inner layer solution to form the inner layer on the core, whereby an inner-layer coated microparticle is obtained; and contacting the inner-layer coated microparticle with an outer layer solution to form the outer layer on the inner-layer coated microparticle.

Dependencies are inferred from the claim text.