The nutrient components of Yangmingshan Yacon root tuber and common fruits and vegetables and other sources of yacon root tuber were compared and analyzed in the test. The results show that the content of iron and zinc of Yangmingshan Yacon root tuber significantly higher than it of common fruits and vegetables, and the content of zinc of it is higher than other sources of Yacon; Yangmingshan Yacon root tuber doesn' t contain fat, and oligosaccharide is the dominate carbohydrate. The Yangmingshan Yacon root tuber is good food for the diabetes ...