(See also Overview of Medicinal Herbs and Nutraceuticals.)
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 can be used fresh, dried, or as a juice or oil.
Many people take ginger to relieve pregnancy-related nausea and vomiting or motion sickness. Scientific studies suggest ginger is effective for pregnancy-related and postoperative nausea and vomiting, but not for nausea caused by chemotherapy. It is unclear whether ginger is effective in treating rheumatoid arthritis, osteoarthritis, or joint and muscle pain.