Yams belongs to the Dioscoreae family. Yam is also known as Suran in India. They are underground tuber. Yams are long and cylindrical in shape, with rough, scaly exteriors. Yam is considered to be a healthy low-fat food and is a rich source of essential fatty acids,dietary fiber, potassium, vitamin C etc. Yam is one of the root vegetables that can be eaten during fasting.