By Dr. Oz
Used by Germans as a cure for respiratory woes. One study found that people with sinus infections who were treated with an herbal drug made from the plant's roots saw their symptoms nearly disappear in just three weeks.
Used in traditional Chinese medicine to calm sore throats and ease upset stomachs. It's also believed that ginger can act as a decongestant to clear nasal passages.
Used by the Finnish to stifle sniffles and soothe the respiratory tract. Black currant berries are packed with vitamin C and other antioxidants that help boost your immune system to fight infection.