Dried ginger is what is used to make powdered ginger. Typically, gingerroots are dried to preserve them for transport and storage.
In Chinese herbal medicine Edit
The herb is pungent in flavour, and hot in nature. It acts on the spleen, stomach, heart and lung channels. Being pungent, hot and extremely dry, mainly warming the spleen and lung, dispersing cold and fluid retention, the herb is often used for cold of both excess type and insufficiency type in the middle-jiao, and cough and asthma due to cold and fluid retention in the lung. In addition, the herb can also warm and support Yang of the heart and kidney to recuperate depleted Yang and invigorate pulse. Therefore, it is used to treat Yang depletion.