Vitamin D and Omega-3 Trial (VITAL)
Running, not enrolling · Phase 3 · Has a placebo group
Conditions studied: Cancer, Cardiovascular Disease
In brief
The VITamin D and OmegA-3 TriaL (VITAL) is a randomized clinical trial in 25,871 U.S. men and women investigating whether taking daily dietary supplements of vitamin D3 (2000 IU) or omega-3 fatty acids (Omacor® fish oil, 1 gram) reduces the risk of developing cancer, heart disease, and stroke in people who do not have a prior history of these illnesses. The 5-year intervention phase (study pill-taking, median 5.3 years) has ended; post-intervention observational follow-up of study participants is ongoing.
Key facts
- Study ID
- NCT01169259
- Run by
- Brigham and Women's Hospital
- People needed
- 25871
- Starts
- 2010-07-01
- Expected to finish
- 2026-10-01
- Last updated by the study team
- 2026-07-30
Who can join
Age: 50 and older. Sex: any. Healthy volunteers: accepted.
Where it is running
- Brigham and Women's Hospital — Boston, Massachusetts, United States
Full record on ClinicalTrials.gov
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