Dioscorea opposita is produced in Jiaozuo, Henan Province, with a slender cylindrical shape, dark skin color and crisp taste.
Yam is produced in Jiangsu, Anhui and other places. Thick in shape, light in skin color and soft and waxy in taste.
Iron stick yam is a kind of yam, which is slender in shape, dark in skin and dry and sweet in taste.
In addition, in terms of nutritional components, the nutritional value of Tiegun Yam is higher than the other two kinds of yam, and it is rich in protein, starch, amino acids and other nutritional components, and has the effects of invigorating spleen, lung and kidney, benefiting qi and nourishing yin.
In a word, yam, Dioscorea opposita and Dioscorea opposita are all kinds of yam, but their origin, shape, taste and nutritional components are different, and they need to be selected according to personal tastes and needs.