Like garlic, ginger has long been used in cooking and in medicine. The stem of this herb contains substances called gingerols, which give ginger its flavor and odor.
Ginger is usually not harmful, although some people experience a burning sensation when they eat it. It may also cause digestive discomfort and cause a disagreeable taste in the mouth. Ginger may increase the risk of bleeding. Therefore, people who take ginger and drugs that prevent blood clots may need to be monitored.