Rehmannia is very popular in Chinese medicine, where it is considered to be a longevity tonic, and one of the 50 fundamental herbs. The species name glutinosa comes from glutinous, referring to the sticky nature of the root. The Rehmannia root offered by Heavenly Products has been prepared in the traditional way with an infusion of yellow wine and black beans. The Rehmannia root is prepared traditionally by boiling the root in a mixture of yellow wine and black bean infusion until the liquid ...(more)