Vitamin D
Vitamin D helps in building strong bones and maintaining the function of the immune system.
A review found that rheumatic patients often have lower levels of vitamin D than those without this condition. Those with the deficiency of vitamin D also tended to face the highest levels of disease activity. However, it is still not confirmed whether taking vitamin D supplements in diet reduce disease activity in arthritic patients.
Current guidelines do not suggest vitamin D supplements for treating osteoarthritis. People can get vitamin D directly from sun exposure or from certain foods. Supplements of vitamin D are also available in medical stores and online.