Sweet potato sprouting long leaves can not be eaten, if only a slight sprouting, get rid of the teeth can also be eaten, just the taste is not so good. Sweet potato sprouting long leaf taboo raw food, at this time the sweet potato called phoenix potato, there are highly toxic, once in the countryside there are farmers to dig out the buds after the raw sweet potato fed to pigs and cattle, appeared in the case of pigs and cattle poisoning death. And also should not eat black spots of sweet potatoes, black spots of sweet potatoes black spots in the virus is not easy to be destroyed by high temperature and kill, easy to cause poisoning, fever, nausea, vomiting, diarrhea and a series of symptoms of poisoning, and will even lead to death. So whether it is potatoes or sweet potatoes, as long as a little deterioration do not try to eat, especially not raw food, so as not to cause unnecessary damage, the loss is not worth it.