Dried sweet potatoes are rich in carotenoids, which can maintain normal vision; they are also rich in fiber, which can help with bowel movements and improve constipation. Dried sweet potatoes have many vitamins and minerals, in addition to protein, starch, pectin and other substances. The main ingredient in dried sweet potatoes is carotene, which provides us with a rich source of vitamin A and keeps us with normal vision. It can accelerate bowel movement and help defecation. In addition dried sweet potatoes contain a lot of pectin and cellulose, can stimulate the secretion of digestive juices, play a role in improving constipation.