At a glance
ClinicalIndex Comparison RecordN/ACompleted· 412 enrolled
Drug / intervention
800 IU Vitamin D +1 moredietary
Likely dose
800 IU Vitamin Dfrom record
Structured eligibility isn't available for this trial yet — see the full criteria in the Eligibility tab below.
Standardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.
Genetic, Dietary and Environmental Influences on Vitamin D Metabolism
In Brief
A clinical study evaluating 800 IU Vitamin D and Placebo for Vitamin D Deficiency. Completed, enrolled 412 participants across 1 site.
Detailed Summary
Determine differences in serum vitamin D metabolism by genetic ancestry.
Study Details
Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
ConditionsVitamin D Deficiency
CountriesUnited States
Collaborators--
Timeline
N/ACompletedFinished
2014201520162017201820192020202120222023202420252026
Enrollment StartNov 2013
First PostedOct 2015
Primary CompletionMay 2018
Study CompletionApr 2019
TodayJul 2026
First PostedOct 29, 2015
Enrollment StartNov 1, 2013
Primary CompletionMay 1, 2018
Study CompletionApr 24, 2019
TodayJul 2, 2026
Enrollment to primary: 4.5 yearsPosted 10.7 years ago
Interventions
800 IU Vitamin Ddietary
Among the cross-sectional study participants, a subset is randomly selected and matched based on genetic ancestry, and randomized to the intervention group.
Placebodietary
Among the cross-sectional study participants, a subset is randomly selected and matched based on genetic ancestry, and randomized to the placebo group