THE EXTRACT FROM REHMANNIA GLUTINOSA FOR ENHANCING IMMUNITY AND PREPARING METHOD THEREOF

摘要

An extract of Rehmannia glutinosa is provided to increase various activities of neutrophil or macrophages and induce strong protectivity on attack inoculation of pathogenic bacteria, thereby being used as an immune enhancing agent, a vaccine adjuvant, an adjuvant therapeutic agent and a feed additive for an animal. An extract of Rehmannia glutinosa enhances immunity of an animal by increasing the activity of immunocyte such as neutrophil or macrophages. A method for preparing the extract of Rehmannia glutinosa comprises the steps of: (a) boiling dried Rehmannia glutinosa with distilled water to obtain the extract of Rehmannia glutinosa; (b) filtering the extract; and (c) hydrolyzing a filtrate.