The Effect of Vitamin D Supplementation During Caloric Restriction on Intestinal Calcium Absorption
Completed · Not applicable
Conditions studied: Weight Loss, Vitamin D or Placebo
In brief
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).
Key facts
- Study ID
- NCT00472654
- Run by
- Rutgers University
- People needed
- 83
- Starts
- 2007-03-01
- Expected to finish
- 2011-03-01
- Last updated by the study team
- 2023-03-28
Who can join
Age: 50 and older, up to 72. Sex: female. Healthy volunteers: accepted.
You may qualify if…
- Postmenopausal women who are more than 2 years since last menses
- Obese or overweight
- Must live in the geographic vicinity of Rutgers University
You may not qualify if…
- 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)
Where it is running
- Rutgers University — New Brunswick, New Jersey, United States
Full record on ClinicalTrials.gov
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