Vitamin D Deficiency and the Rising Risk of Rheumatoid Arthritis in Women Recent research from the Mayo Clinic has identified a concerning trend: rheumatoid arthritis (RA) is increasing among Caucasian women, and vitamin D deficiency appears to be a significant contributing factor. While rheumatoid arthritis is a complex autoimmune condition influenced by genetics, lifestyle, and environmental factors, researchers noted that the most plausible explanation for the rising incidence is the increasing prevalence of vitamin D deficiency, particularly among women. Why Vitamin D Matters in Rheumatoid Arthritis Vitamin D plays a critical role in: Immune system regulation Inflammation control Bone and joint health Low vitamin D levels have been associated with increased autoimmune activity, which may help explain its link to rheumatoid arthritis. As vitamin D deficiency has become more common—due to indoor lifestyles, sun avoidance, and inadequate dietary intake—rates of im…