what is wild yam good for

{"cid":"91221813","title":"Slow-Simmered Dragon Bone Soup with Gastrodia & Kudzu Root Nutrient-Dense Broth for Bone Health Nerve Support & Mental Clarity","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/b2\/b2\/22168bf79cf0ce2e7e3f371f7f92-200x200-1.jpg","attrs":{"Price":"Receive bargaining","Brand Name":"ZeaGrove","Minimum Order Quantity":"1000 pcs","Delivery Time":"5-8 works days","Certification":"ISO9001 , HACCP , FDA","Place of Origin":"CHINA","Payment Terms":"L\/C , D\/A , D\/P , T\/T , Western Union , MoneyGram","Supply Ability":"1.2 million pcs per day","Packaging Details":"Gift box, six bowls in a box","Ingredient list":"Water , Pork (keel) , Gastrodia , Kudzu , Lotus seeds, lLly , Yam , Ginger , Wolfberry , Salt","Net Weight":"258 g Solid content\u226520%","Shelf life":"12 months at room temperature","Additive":"0 Additive","Package":"Seal","Storage method":"Store in a ventilated and cool place at room temperature (below 25\u00b0C), refrigerate after opening the bag and consume within 24 hours."}}