... 2.Moisture: <5% or <8%3..Advantages:1) Yam contains amylase,polyphenol oxidase and other substances, conducive to digestion ... the body stronger, nourishing kidney increase sperm role.3) Yam contains saponins, lymphatic temperament, have lubrication, moist effect.. ... wall of precipitation, prevention the heart blood disease.6) Yam sedative abilities, can come to resistance to hepatic encephalopathy. ...