Pharmacokinetic Study: Effect of 25(OH)D and Vitamin D3 on Serum 25(OH)D

December 22, 2011 updated by: University of Zurich

Pharmacokinetic Study in Healthy Postmenopausal Women to Compare Supplementation of Vitamin D3 to 25(OH)D

We compare the effect of HyD (25-hydroxyvitamin D) and vitamin D3 in their effect on 25-hydroxyvitamin D plasma levels over a course of 4 month. This is a pharmacokinetic study including 35 postmenopausal women.

  • Trial with medicinal product

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

We include postmenopausal women age 50 to 75, race/ethnicity: Caucasian, serum 25(OH)D at baseline between 20 to 60 nmol/l, body mass index: < 30 kg/m2

to compare 25(OH)D and vitamin D3 in equimolar doses over a 4 month pharmacokinetic trial. The dosing arms are daily, weekly, and bolus

Study Type

Interventional

Enrollment (Actual)

35

Phase

  • Phase 1

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

  • Switzerland
    • ZH
      • Zurich, ZH, Switzerland, 8091
        • University Hospital Zurich, Centre on Aging and Mobility

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

50 years to 75 years (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

Female

Description

Inclusion criteria:

  • Postmenopausal women
  • Age 50 to 75 years
  • Body mass index 18-29 kg/m2
  • 25-hydroxyvitamin D levels 20 to 60 nmol/l
  • Caucasian
  • Generally healthy

Exclusion criteria:

  • Serum calcium > 2.6 nmol/L
  • Use if dietary supplements (> 400 IU vitamin D per day, > 600 mg of calcium per day)
  • Hypertension
  • Diseases that carry the risk of hypercalcemia
  • Use of any drug that interferes with bone metabolism in the last 12 months (bisphosphonates estrogen receptor modulators, PTH, calcitonin)
  • Oral HRT in the last 6 months
  • Extreme diets
  • Fracture or fall in the last 3 months
  • Current smoking or alcohol abuse
  • Planning on a sunny vacation in the course of the trial
  • Kidney stone history
  • Creatinine clearance < 30 ml/min
  • Co-medications: anticoagulants, PTH, corticosteroids, thiazide diuretics, digoxin, anticonvulsants, malabsorption,z C

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: Quadruple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: 1
25(OH)D
Drug: 25(OH)D
daily (20ug), weekly (140 ug), Bolus (140 ug)
Other Names:
  • HyD
Active Comparator: 2
vitamin D3
Dietary supplement: vitamin D3
daily (800 IU), weekly (5600 IU), Bolus (5600 Iu)
Other Names:
  • Cholecalciferol

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
serum 25(OH)D levels
Time Frame: repeated assessments over 4 months
repeated assessments over 4 months

Secondary Outcome Measures

Outcome Measure
Time Frame
muscle strength, blood pressure, blood glucose, bone markers
Time Frame: repeated assessments over 4 months
repeated assessments over 4 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University of Zurich

Investigators

  • Principal Investigator: Heike Bischoff Ferrari, MD, MPH, University Hospital Zurich, Centre on Aging and Mobility

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

March 1, 2008

Primary Completion (Actual)

August 1, 2008

Study Completion (Actual)

September 1, 2008

Study Registration Dates

First Submitted

July 17, 2008

First Submitted That Met QC Criteria

July 17, 2008

First Posted (Estimate)

July 18, 2008

Study Record Updates

Last Update Posted (Estimate)

December 23, 2011

Last Update Submitted That Met QC Criteria

December 22, 2011

Last Verified

December 1, 2011

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2007-09-13-HyD

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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