Massive study tests if everyday supplements ward off diabetes

NCT ID NCT01633177

First seen Apr 19, 2026 · Last updated May 12, 2026 · Updated 4 times

Summary

This large study looked at whether taking daily vitamin D or fish oil supplements can help prevent type 2 diabetes. Over 22,000 adults without diabetes took part. Researchers tracked who developed diabetes over time to see if these supplements lower the risk.

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Contacts and locations

Locations

  • Division of Preventive Medicine, Brigham and Women's Hospital

    Boston, Massachusetts, 02215, United States

Conditions

Explore the condition pages connected to this study.