Massive study tests everyday supplements for disease prevention

NCT ID NCT01169259

First seen Nov 01, 2025 · Last updated May 08, 2026 · Updated 27 times

Summary

This large study tested whether taking daily vitamin D and omega-3 (fish oil) supplements could lower the risk of developing cancer, heart disease, or stroke in healthy older adults. Over 25,000 men and women aged 50+ took the supplements for about 5 years. The goal was to see if these common vitamins could prevent serious illnesses in people without prior disease.

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This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.

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Contacts and locations

Locations

  • Brigham and Women's Hospital

    Boston, Massachusetts, 02215, United States

Conditions

Explore the condition pages connected to this study.