... quality products and instant services. ISO certification Product name: Chinese Yam PowderActive ingredient: diosgenine Spec: 10:1, pure powder Chinese ... is Rhizoma dioscoreae. Other names for Chinese yam include dioscorea and shan yao. Chinese yam is native to China, Japan, Korea, ... valleys. It is also propagated for medicinal and dietary uses. Yam is high in vitamins C and B6, potassium, manganese and ...