Ginger is a common spice known for its "stimulating carminative" property throughout the world, especially in Asia. We can cook it in hot dish for its pungent flavor, or eat it raw like the raw ginger marinated with vinegar in Japanese cuisine. Because of its action on promoting gastrointestinal circulation, significant evidence has been brought up of the usefulness of ginger against motion sickness, nausea and vomiting.
Ginger for Motion Sickness and Nausea
Conducted by Svensborg Hospital in Denmark, seasickness trial and clinical study have shown that ginger was as effective as over-the-counter drugs in dealing with motion sickness. It is indeed a safer option that OTC drugs which cause drowsiness. Another clinical study conducted by Department of Anesthesiology at St. Bartholomew's Hospital in London showed that 1g of ginger powder was as effective at preventing postoperative nausea and vomiting as the tranquilizer commonly used by hospitals and much safer.
Ginger Caution: German Federal Health Agency does not recommend pregnant women taking excessive dose of ginger to deal with morning sickness because of the possibility of its inhibition of testosterone binding in the fetus although no evidence from any studies that such an effect is possible.