- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01013584
The Effect of Weight on Vitamin D Dose Response (Weight)
June 25, 2012 updated by: Creighton University
Vitamin D3 is a vitamin that is an essential component of biological regulating systems in humans.
Sun exposure is the predominant source of vitamin D3.
Previous research has shown that vitamin D3 deficiency is common worldwide.
It is especially common in northern countries with long winters due to inadequate sun exposure during winter.
In the US, an estimated 36% to 57% of healthy middle-aged to elderly adults have vitamin D3 deficiency.
Current research indicates that obesity is associated with a low vitamin D3 level.
Study Overview
Status
Completed
Conditions
Intervention / Treatment
Detailed Description
Obesity is a known risk factor for vitamin D deficiency.
Adequate levels of vitamin D are important, not only for bone health, but appear to be important for prevention of certain autoimmune diseases, infections and cancers.
Current FDA recommendations for vitamin D intake do not differentiate between lean and obese people.
There are no published studies indicating if the 25(OH)D response to a given daily dose of vitamin D is any less in an obese person than a normal weight person.
The purpose of this study is to characterize the quantitative relationship between steady state cholecalciferol input and the resulting serum 25 (OH)D concentration in obese subjects.
Data obtained in this study will be compared to published normative data for non-obese subjects.
Recommendations will be provided for optimal treatment of vitamin D deficiency in obese men and women.
Study Type
Interventional
Enrollment (Actual)
67
Phase
- Not Applicable
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
-
-
Nebraska
-
Omaha, Nebraska, United States, 68131
- Creighton University
-
-
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
19 years to 60 years (Adult)
Accepts Healthy Volunteers
Yes
Genders Eligible for Study
Male
Description
Inclusion Criteria:
- men aged 19 to 60 with BMI > 30.0.
- They will have low (<1,000 IU) usual intake of vitamin D (from milk, multivitamins, supplements, and fortified foods)
Exclusion Criteria:
- Subjects will not have history of hepatic or renal disease.
- Subjects will not be taking medications known to affect vitamin D metabolism such as anti-seizure medications and/or corticosteroids.
- They will not be on hydrochlorothiazide medications which could cause hypercalcemia.
- They will not have diseases causing malabsorption of vitamin D, such as celiac sprue or small bowel surgeries.
- Pregnancy is also an exclusion criterion.
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Single
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: 1,000 IU
1,000 IU/day of vitamin D3
|
daily dose
|
Active Comparator: 5,000 IU
5,000 IU/day of vitamin D3
|
daily dose
|
Active Comparator: 10,000 IU
10,000 IU/day of vitamin D3
|
daily dose
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
To characterize the dose response of 25(OH)D to 1,000, 5,000 or 10,000 IU/day of vitamin D3 for 21 weeks in a group of obese men and women.
Time Frame: 21 weeks
|
21 weeks
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Investigators
- Principal Investigator: Andjela Drincic, MD, Creighton University
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start
November 1, 2009
Primary Completion (Actual)
June 1, 2011
Study Completion (Actual)
July 1, 2011
Study Registration Dates
First Submitted
November 12, 2009
First Submitted That Met QC Criteria
November 12, 2009
First Posted (Estimate)
November 13, 2009
Study Record Updates
Last Update Posted (Estimate)
June 26, 2012
Last Update Submitted That Met QC Criteria
June 25, 2012
Last Verified
June 1, 2012
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- Creighton 8
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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