Yacon syrup is an all-natural, organic sugar sweetener that has a very low glycemic index. It comes from the roots of the yacon plant. It is a tuberous root similar to a potato. Tubers form on a plant to store liquid and nutrients, making it a nutrient-rich plant source. With the yacon plant, the nutrients are fibrous and difficult to digest in the stomach. It gets into the intestine and colon without being fully digested, where it provides food for the healthy flora in the intestine. Peruvians eat this as a vegetable because of its nutritional value and low calories and sugar level. It is also a good source of fiber.