Yacon syrup contains prebiotics – inulin and fructooligosaccharides (FOS). It is also low in calories as well. In fact, it only has about twenty calories in each tablespoon. The FOS in Yacon is known for feeding the bacteria that is located in the colon – Bifidus and Lactobacillus. Researchers have found that Yacon helps maintain good bowel bacteria, anti-inflammatory, and it boosts your immune system. Which results in you being able to keep a healthy weight. Not to mention the fact that there is evidence that suggests that it also allows people to eat less because it controls appetite and food cravings.