Function 1. Wild yam is one of the more widely used tonic herbs. Because the herb has a neutral energy and therefore is neither hot nor cold, it benefits everybody who takes it. It helps to build strong digestion and metabolism. 2. Wild yam is also helps strengthen improve lung function, benefiting the whole body.it is commonly used in formulations designed to relieve coughing due to weakened lungs. 3. Wild yam has both essence building power and an astringent action that preventing leaking of fluids. It is widely recommend for the leakage problems, such as spermatorrhea, leukorrhea and frequent urination. It is also often used by people suffering night sweats as a result of general weakness or chronic consumptive illness. Application Field Applied in functional food field, health care products field, cosmetic field and pharmaceuticals field.