Vitamin d and fish oil: a simple fix for autoimmune and knee pain?

NCT ID NCT01351805

First seen Jan 06, 2026 · Last updated May 15, 2026 · Updated 21 times

Summary

This study looked at whether taking daily vitamin D or fish oil supplements could lower the risk of autoimmune diseases (like rheumatoid arthritis), reduce signs of inflammation in the blood, and ease chronic knee pain. Over 25,000 adults without prior cancer or heart disease took part. Researchers measured inflammation markers and tracked new autoimmune cases and knee pain severity over time.

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Contacts and locations

Locations

  • Brigham and Women's Hospital

    Boston, Massachusetts, 02115, United States

Conditions

Explore the condition pages connected to this study.