Ginger has long been known for its health benefits, which include everything from helping with digestion to fighting the growth and spread of both colorectal and ovarian cancer. But ginger also has anti-inflammatory properties which can benefit people suffering from osteoarthritis and rheumatoid arthritis. A recent study from the University of Miami found individuals who were given a highly concentrated ginger extract experienced a 40 percent reduction in pain and stiffness in their knee joints. Adding grated ginger to salads and stir fry is one way to increase your consumption, though there are also supplements and powders available. More here and here.