Vitamin D and Type 2 Diabetes Study
Public ClinicalTrials.gov record NCT01942694. 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.
The goal of the Vitamin D and type 2 diabetes (D2d) study is to determine if vitamin D supplementation works to delay the onset of type 2 diabetes in people at risk for the disease and to gain a better understand how vitamin D affects glucose (sugar) metabolism.
Study identification
- NCT ID
- NCT01942694
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Not applicable
- Enrollment
- 2,423 participants
Conditions and interventions
Conditions
Interventions
- Vitamin D (Cholecalciferol) Dietary Supplement
- Placebo Other
Dietary Supplement · Other
Eligibility (public fields only)
- Age range
- 30 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
- Oct 2013 (Type not available)
- Primary completion
- Nov 2018 (Actual)
- Completion
- Nov 2018 (Actual)
- Last update posted
- Aug 16, 2022
2013 – 2018
United States locations
- U.S. sites
- 25
- U.S. states
- 20
- U.S. cities
- 23
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Southwest American Indian Center | Phoenix | Arizona | 85016 | — |
| University of Southern California | Los Angeles | California | 90022 | — |
| Stanford University | Palo Alto | California | 94304 | — |
| University of Colorado, Denver | Aurora | Colorado | 80045 | — |
| Orlando VA Medical Center | Orlando | Florida | 32803 | — |
| Florida Hospital Translational Research Institute | Orlando | Florida | 32804 | — |
| Atlanta VA Medical Center | Decatur | Georgia | 30033 | — |
| Northwestern University | Chicago | Illinois | 60611 | — |
| University of Kansas Medical Center | Kansas City | Kansas | 66205 | — |
| Pennington Biomedical Research Center | Baton Rouge | Louisiana | 70808 | — |
| Tulane University Health Sciences | New Orleans | Louisiana | 70112 | — |
| Maine Medical Center | Scarborough | Maine | 04074 | — |
| MedStar Community Clinical Research Center | Hyattsville | Maryland | 20782 | — |
| Tufts Medical Center | Boston | Massachusetts | 02111 | — |
| Health Partners Riverside Clinic | Minneapolis | Minnesota | 55454 | — |
| Omaha VA Medical Center | Omaha | Nebraska | 68105 | — |
| University of Nebraska Medical Center | Omaha | Nebraska | 68198 | — |
| Beth Israel Medical Center | New York | New York | 10003 | — |
| Duke University | Durham | North Carolina | 27704 | — |
| Cleveland Clinic | Cleveland | Ohio | 44195 | — |
| Kaiser Permanente Center for Health Research | Portland | Oregon | 97227 | — |
| Medical University of South Carolina | Charleston | South Carolina | 29425 | — |
| University of Tennessee Health Science Center | Memphis | Tennessee | 38105 | — |
| University of Texas Southwestern Medical Center | Dallas | Texas | 75390 | — |
| Baylor College of Medicine | Houston | Texas | 77030 | — |
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 NCT01942694, 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 Aug 16, 2022 · Synced Oct 20, 2026
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Open the official record
The complete public registry record, listed eligibility criteria, and available contact information for NCT01942694 live on ClinicalTrials.gov.