Status:
COMPLETED
The Effect of Vitamin D Supplementation During Caloric Restriction on Intestinal Calcium Absorption
Lead Sponsor:
Rutgers University
Collaborating Sponsors:
National Institute on Aging (NIA)
Conditions:
Weight Loss
Vitamin D or Placebo
Eligibility:
FEMALE
50-72 years
Phase:
NA
Brief Summary
The purpose of this study is to learn how the amount of vitamin D supplementation influences intestinal fractional calcium absorption (a measure of the amount of calcium absorbed).
Detailed Description
The extent of change in the amount of calcium that is absorbed with an increase in vitamin D supplementation is not known. This information is important for determining appropriate vitamin D requireme...
Eligibility Criteria
Inclusion
- Postmenopausal women who are more than 2 years since last menses
- Obese or overweight
- Must live in the geographic vicinity of Rutgers University
Exclusion
- Currently on any medication known to influence calcium or bone metabolism, including HRT, or with evidence of diseases known to influence calcium metabolism (i.e. metabolic bone disease, hyperparathyroidism, untreated thyroid disease, significant immune, hepatic, or renal disease, significant cardiac disease \[i.e., heart attack or stroke in the past 6 months., abnormal EKG\], active malignancy or cancer therapy within the past year)
- History of kidney stones
- Weight gain or weight loss (5% of body wt) within 3 months prior to recruitment
- Participation in other investigational studies during the study period
- Travel for longer than 2 consecutive weeks during the study period
- Usually have a very high or low intake of calcium (more than 1500 or less than 500 mg per day)
Key Trial Info
Start Date :
March 1 2007
Trial Type :
INTERVENTIONAL
Allocation :
ACTUAL
End Date :
March 1 2011
Estimated Enrollment :
83 Patients enrolled
Trial Details
Trial ID
NCT00472654
Start Date
March 1 2007
End Date
March 1 2011
Last Update
March 28 2023
Active Locations (1)
Enter a location and click search to find clinical trials sorted by distance.
1
Rutgers University
New Brunswick, New Jersey, United States, 08901