Can vitamin D supplements prevent RA flares?

Maintaining sufficient levels of vitamin D may help to prevent the onset of inflammatory diseases, such as rheumatoid arthritis, a study confirms.

Supplementation would be less effective once the disease is established but could even prevent disease flares, the researchers say.

The study is the first to investigate the impact of vitamin D on immune cells at the site of active disease, not just in blood, revealing that cells from synovial fluid in patients with RA are less sensitive to vitamin D.

Further studies were needed to identify the cause of this