Hello htwinx sorry to hear about your nausea.Was the grass you juiced moldy?Grass juice is an intense detoxifier which can cause nausea.When people first start taking grass juice uneasy feeling headachy symptoms are common!The slime mold that likes the same conditions as wheat/barley grass does is non toxic.But if you are having a mold problem it will need to be addressed.Mold is everywhere including the great outdoors.The biggest issue with mold is moistour control.Along with adequate ventalation.Good luck and happy holidays!