Bazhen Tang is one of the quintessential tonics of Chinese herbal medicine. First recorded in its present form during the 14th century, this formula combines the representative qi tonic Si Junzi Tang (Four Gentlemen Decoction) with the archetypal blood tonic, Siwu Tang (Four Substance Decoction). Its design reflects the vital Chinese medicine concept that the body’s Spleen qi is the generative force behind the formation of Liver Blood. This remedy is most often prescribed for women, especially when symptoms of Blood deficiency are involved. One standard application of Bazhen Tang, for example, is recovery in postpartum situations. Since the Spleen is responsible for the formation and maintenance of healthy connective tissue, and Liver Blood is needed for the nourishment of skin, nails and hair, this remedy is also one of the most popular beauty tonics in Asian civilizations. Due to the importance of the Spleen and the Liver for a multitude of physiological functions, Bazhen Tang can also be used to address a variety of other issues, such as insomnia or the elimination of scar tissue.