Dioscoria batatas (Shan Yao)
Atmospheric energy: neutral
Meridians: Spleen, Lung, Kidney and Stomach
Tonic action: nutrient, demulcent, Qi tonic
Chinese yam is used for such symptoms as frequent urination, incontinence of seminal fluid, and vaginal discharge. It is also useful when there is Lung Qi deficiency with symptoms such as spontaneous sweating, chronic cough, and difficulty breathing. Tonifies Spleen and Lung Qi and also tonifies both the Yin and the Yang of the kidneys and the Lungs.