Physicochemical characteristics of rapidly dried onion powder and its anti-atherogenic effect on rats fed high-fat diet

► Rapidly dried onion powder contains high quercetin derivatives and pectin contents. ► Hot-water extraction is an effective method to extract quercetin derivatives. ► Enzymatic treatment with cellulase and pectinase can release free quercetin. ► Animal experiment indicates the onion powder has the anti-atherogenic effect.