At a glance
ClinicalIndex Comparison RecordPhase 1Completed· 328 enrolled
Drug / intervention
Vitamin D +1 moredrug
Likely dose
Not stated in 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.
Defining Optimal Doses of Vitamin D for Chemoprevention in Blacks.
In Brief
A Phase 1 clinical trial evaluating Vitamin D and Placebo for Gastrointestinal Cancers and 2 related conditions. Completed, enrolled 328 participants across 1 site.
Detailed Summary
This study will help us know the effects of Vitamin D pills in Blacks. The results of this study may be the first step in creating ways to prevent the risks of colon and prostate cancer. It will also help us develop ways to reduce colon cancer and prostate cancer among Blacks. This study will find out if Vitamin D pills can increase Vitamin D to healthy levels in our bodies.
Study Details
Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
ConditionsGastrointestinal Cancers, Prostate Cancer, Hypertension
CountriesUnited States
CollaboratorsHarvard School of Public Health (HSPH)
Timeline
Phase 1CompletedFinished
20082009201020112012201320142015201620172018201920202021202220232024202520262027
Enrollment StartOct 2007
First PostedJan 2008
Primary CompletionOct 2010
Study CompletionDec 2013
TodayJul 2026
First PostedJan 3, 2008
Enrollment StartOct 1, 2007
Primary CompletionOct 1, 2010
Study CompletionDec 1, 2013
TodayJul 2, 2026
Enrollment to primary: 3 yearsPosted 18.5 years ago
Interventions
Vitamin Ddrug
Taken orally every day for three months
Placebodietary
Placebo pill taken once daily for 3 month