Intervention With Vitamin D and Omega-3 Supplements and Incident Heart Failure
Public ClinicalTrials.gov record NCT02271230. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
This study will examine whether an intervention with vitamin D or fish oil supplements can reduce the risk of heart failure among adult men and women during a follow up period of up to five years (starting from the time of randomization into the parent VITAL trial). The investigators hypotheses are that both vitamin D and fish oil supplements will each reduce the risk of heart failure.
Study identification
- NCT ID
- NCT02271230
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Phase 3
- Enrollment
- 25,871 participants
Conditions and interventions
Conditions
Interventions
- Vitamin D and fish oil Drug
- Fish oil (EPA/DHA) alone Dietary Supplement
- Vitamin D alone Drug
- Placebo Other
Drug · Dietary Supplement · Other
Eligibility (public fields only)
- Age range
- 50 Years and older
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Jul 31, 2014
- Primary completion
- Nov 30, 2019
- Completion
- Nov 30, 2019
- Last update posted
- Mar 17, 2022
2014 – 2019
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Brigham and Women's Hospital | Boston | Massachusetts | 02120 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
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About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT02271230, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Mar 17, 2022 · Synced Sep 1, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT02271230 live on ClinicalTrials.gov.