A Single Wintertime Dose of Vitamin D3 to Prevent Winter Decline in Vitamin D Status in Healthy Adults
Public ClinicalTrials.gov record NCT01924910. 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.
Official title
A Single Wintertime Dose of Vitamin D3 to Prevent Winter Decline in Vitamin D Concentrations in Healthy Adults: A Pilot Study
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
The purpose of this study is to determine if a single dose of vitamin D administered orally in the fall will provide adequate vitamin D in healthy individuals for the duration of the winter, during which vitamin D levels are known to decrease. The investigators are also interested in finding out if this level of vitamin D will provide adequate levels for the remainder of the year. While the benefits of once-yearly vitamin D administration are clear for patients with osteoporosis, osteomalacia, rickets, and other conditions associated with vitamin D deficiency and high bone turn-over, studies have not been performed in which high doses of vitamin D were used to prevent the seasonal decline of vitamin D concentrations in healthy individuals. These findings could provide evidence to support vitamin D administration to healthy individuals in the wintertime to improve health outcomes, and provide the basis for additional studies in both healthy and sick populations.
Study identification
- NCT ID
- NCT01924910
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Phase 4
- Enrollment
- 28 participants
Conditions and interventions
Conditions
Interventions
- 250,000 IU cholecalciferol as single, oral dose Dietary Supplement
- Placebo Dietary Supplement
Dietary Supplement
Eligibility (public fields only)
- Age range
- 18 Years to 65 Years
- Sex
- All
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Oct 2012 (Type not available)
- Primary completion
- Dec 2013 (Actual)
- Completion
- Jul 2017 (Actual)
- Last update posted
- Jul 13, 2017
2012 – 2017
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Emory University Campus | Atlanta | Georgia | 30322 | — |
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 NCT01924910, 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 Jul 13, 2017 · Synced Oct 23, 2026
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Open the official record
The complete public registry record, listed eligibility criteria, and available contact information for NCT01924910 live on ClinicalTrials.gov.