Yaconz yacon syrup is one of the best dietary sources of fructooligosaccharides (FOS), a type of fructan. Fructans are a category of soluble dietary fibre. Because a large part of yacon syrup isn’t digested, it has only a third of the caloric value of sugar. For this reason, it can be used as a low-calorie alternative to sugar.
A 2009 study in Clinical Nutrition took a look at how daily consumption of syrup made from yacon root affected weight loss and blood sugar, and according to researchers,