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The Interaction Between Calcium and Vitamin D Intake

NCT00762775 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 78

Last updated 2014-12-11

No results posted yet for this study

Summary

We will study the relative importance of high calcium intake and vitamin D supplementation for calcium homeostasis, as determined by serum parathyroid hormone (PTH) and biochemical bone markers. We also intend to examine the interaction of vitamin D and calcium intake on calcium homeostasis. We hypothesize that optimal calcium supplementation and optimal vitamin D supplementation will lead to lower serum levels of PTH and markers of bone resorption compared with the placebo. We also theorize that when taken together, optimal calcium supplementation and optimal vitamin D intake will result in lower serum levels of PTH and bone markers compared with calcium or vitamin D taken alone.

Conditions

Interventions

DIETARY_SUPPLEMENT

Calcium and vitamin D supplementation

Arm 1: 1,200 mg daily of calcium supplementation and placebo; Arm 2: 100 microgram daily of Vitamin D and placebo; Arm 3: 1,200 mg of calcium and 100 microgram of Vitamin D daily; Arm 4: placebos only.

Sponsors & Collaborators

  • Winthrop University Hospital

    lead OTHER

Principal Investigators

  • John F. Aloia, MD · Winthrop University Hospital

Study Design

Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
DOUBLE
Model
PARALLEL

Eligibility

Min Age
45 Years
Max Age
85 Years
Sex
FEMALE
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2008-11-30
Primary Completion
2011-06-30
Completion
2011-06-30

Countries

  • United States

Study Locations

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Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT00762775 on ClinicalTrials.gov