Which vitamin is listed among RA supplements?

• A. Vitamin D
• B. Vitamin A
• C. Vitamin C
• D. Vitamin K

Answer: (A)

Vitamin D is commonly listed for rheumatoid arthritis because it supports bone health and may influence immune function. People with RA are at higher risk of osteoporosis and fractures, partly due to chronic inflammation and long-term corticosteroid use. Vitamin D helps with calcium absorption and bone remodeling, helping protect bone density in RA patients. There’s also some evidence suggesting vitamin D can modulate immune responses and inflammatory processes relevant to RA, though findings aren’t definitive. Other vitamins like A, C, and K are important for general health, but they aren’t as routinely emphasized specifically for RA in standard supplement guidance. That combination—supporting bones and potentially helping immune regulation—makes vitamin D the most commonly listed choice among RA supplements.