1. The main difference between Tiegun yam and Huaiyam lies in the different places of production. Tiegun yam is produced in Jiaozuo, Henan. It is the best Huaiyam. Its taste and nutritional value are the best among other Huaiyam. The difference is Density, yam with the same thickness, iron bar yam is harder and heavier, takes less time to cook, tastes sweet, and has a special Chinese medicinal flavor.

2. Tieguang yam is rich in starch, contains vitamins, mannan, 18 kinds of amino acids such as alanine and glutamic acid, and also contains more than ten kinds of trace elements such as iron, calcium and zinc. Rich in nutrients, it is a good gift. Huaiyam has the effects of nourishing the spleen and stomach, nourishing the lungs and promoting fluid production, and nourishing the kidneys and astringent essence.