Vitamin D and Omega-3 Trial to Prevent and Treat Diabetic Kidney Disease

ClinicalTrials.gov ID: NCT01684722

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Brief summary

Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.

The VITamin D and OmegA-3 TriaL (VITAL; NCT 01169259) is a randomized clinical trial in 20,000 U.S. men and women investigating whether taking daily dietary supplements of vitamin D3 (2000 IU) or fish oil (1 gram of omega-3 fatty acids) reduces the risk of developing cancer, heart disease, and stroke in people who do not have a prior history of these illnesses. This ancillary study is being conducted among participants in VITAL with a history of diabetes and will examine whether vitamin D or fish oil prevents the development and progression of diabetic kidney disease.

Study identification

NCT ID: NCT01684722
Recruitment status: Completed
Study type: Interventional
Phase: Not applicable
Lead sponsor: University of Washington; Other
Enrollment: 1,312 participants

Conditions and interventions

Conditions

Diabetes

Interventions

Vitamin D Dietary Supplement
Omega-3 fatty acids (fish oil) Drug
Vitamin D placebo Dietary Supplement
Fish oil placebo Dietary Supplement

Dietary Supplement · Drug

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 2010 (Actual)
Primary completion: Nov 8, 2019 (Actual)
Completion: Nov 8, 2019 (Actual)
Last update posted: Jun 21, 2022

2010 – 2019

United States locations

U.S. sites: 1
U.S. states: 1
U.S. cities: 1

Facility	City	State	ZIP	Site status
Brigham Women's Hospital	Boston	Massachusetts	02115	—

Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.

About this trial record page

What this page shows: Public field values for ClinicalTrials.gov record NCT01684722, 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 Jun 21, 2022 · Synced Nov 13, 2026