From the point of view of porridge, fresh yam will be better, because it contains liquid and porridge tastes good. It is best to use yam, which is slender. Coarse yam is generally brittle, not as good as fine yam.

If it is powdered, if it is taken orally, it is better to dry it, and the porridge is naturally fresh. Yam is beneficial to lung, spleen and kidney, and its medicinal properties are peaceful. It is suitable for all kinds of people, but it is effective after long-term use, and it is a good product for invigorating spleen and kidney.