If a small amount of buds just appeared in the sweet potato, at this time its nutrient composition has not changed much, there is no toxic ingredients, so it can be eaten, but the taste will be reduced, not so sweet, the texture is not so pink glutinous. But if the sweet potato has been sprouted, the surface appears brown or black spots, then it is not recommended to eat again, otherwise it is easy to produce some adverse effects on human health. Not sprouted sweet potato four preservation methods:1. Indoor storage room temperature is best controlled at about 15 ℃, stored in a breathable wooden box. If you don't have a wooden box, the place where you stack sweet potatoes and the place against the wall should be padded with wooden boards, and the pile of potatoes should be covered with something to protect them from moisture. During the warm daytime, open the windows appropriately to keep the indoor air fresh and prevent the cold wind from blowing in.