Yes, I checked the ingredients of several things, which will not produce toxic things and will not absorb bad nutrients. In addition, adding hawthorn to sparerib soup will make the meat stew faster, but the taste has not been tried yet. I've made spareribs with lily and hawthorn, and it's ok. I don't think there will be any problem with adding more yam. In addition, this soup can help calm nerves and help sleep.