9. Green Tea
This mild, slightly astringent tea contains hundreds of powerful antioxidant chemicals called polyphenols and has been cited for helping prevent problems ranging from cancer to heart disease. But studies also suggest green tea make help prevent or ease symptoms of rheumatoid arthritis. In one study of induced arthritis in mice, green tea cut the disease onset rate almost in half and follow-up studies by the same researchers, at Ohio’s Case Western Reserve University, show promise in humans.