Herba Cynomorii. Part used: Stem. Known as Stem Flesh/Lock Yang Stem. Entering meridians: Large Intestine, Kidney and Liver. Suo Yang tonifies the kidneys, benefits Jing and marrow, strengthens Yang, nourishes liver Yin and blood, strengthens the sinews and bones, moistens the intestines, unblocks the bowels and nourishes the blood. All Phoenix Medical dry authentic herbs and concentrated herbal granules are free of sulphur, herbicides and pesticides.