Move over vitamins A, B, C and E. It is beginning to look like the long ignored vitamin D is every bit as important for preventing disease as you are. New research makes the case that vitamin D helps protect older women against rheumatoid arthritis -- an autoimmune joint disorder of unknown cause. Recent studies have also linked deficiencies of vitamin D to other disorders such as certain cancers, heart disease, diabetes, and even unexplained pain but its role in human autoimmune disease is less clear.
