Effect of Vitamin D Supplementation on Hemoglobin A1c in Patients With Uncontrolled Type 2 Diabetes Mellitus
Public ClinicalTrials.gov record NCT00985361. 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 purpose of this study is to determine if daily supplementation with 2000 International Units of Vitamin D will improve hemoglobin A1c in uncontrolled type 2 diabetics.
Study identification
- NCT ID
- NCT00985361
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Not applicable
- Enrollment
- 37 participants
Conditions and interventions
Conditions
Interventions
- Vitamin D3 2000 international units daily Dietary Supplement
- Vitamin C 500mg daily Dietary Supplement
Dietary Supplement
Eligibility (public fields only)
- Age range
- 21 Years to 75 Years
- 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
- Sep 30, 2009
- Primary completion
- Feb 28, 2010
- Completion
- Feb 28, 2010
- Last update posted
- May 5, 2010
2009 – 2010
United States locations
- U.S. sites
- 3
- U.S. states
- 1
- U.S. cities
- 2
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Flower Hospital Family Medicine Residency | Sylvania | Ohio | 43560 | — |
| Center for Health Services | Toledo | Ohio | 43606 | — |
| Toledo Hospital Family Medicine Residency | Toledo | Ohio | 43606 | — |
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 NCT00985361, 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 May 5, 2010 · Synced Sep 3, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT00985361 live on ClinicalTrials.gov.