Ginger

Source=Roots of the ginger plant Zingiber officinale
Flavor=Mix of pepper and sweetness
Best Use=Dried powder or freshly grated from root
Cooking Use=Cakes, breads, cookies, as well as Asian dishes

Whether you've got heartburn, abdominal cramps or a queasy stomach, a soothing cup of ginger is the herbalist's stomach remedy of choice. Ginger contains compounds similar to the digestive enzymes found in your digestive tract, which may help you digest a heavy, protein-rich meal more easily. Ginger is particularly effective for motion sickness: In fact, studies show it's even more effective than the prescription drug Dramamine.
Studies suggest that ginger can be useful in keeping cholesterol levels under control.
Cold and flu germs have declared open season, and you've got a target on your back. Chinese herbalists have used ginger for generations to treat colds and flu, and modern studies confirm that ginger helps kill the influenza virus and helps the immune system wage war on infection. If you feel a cold coming on, try sipping on ginger tea throughout the day.
Also great for menstrual cramps.