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Clinical Approaches to Correcting Vitamin D Inadequacy and Maintaining Adequacy

NCT00692120 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 64

Last updated 2015-10-05

No results posted yet for this study

Summary

Vitamin D is available in two forms, vitamin D2 and vitamin D3. It has previously been assumed that these two forms maintain blood vitamin D equally. However, this may not be the case. This study will evaluate whether D2 and D3 produce equal elevation of blood vitamin D. Additionally, it will evaluate whether once per month vitamin D dosing is as effective in maintaining blood vitamin D levels as daily dosing.

Conditions

  • Vitamin D Inadequacy
  • Vitamin D Deficiency

Interventions

DIETARY_SUPPLEMENT

Cholecalciferol (vitamin D3)

50,000 IU once monthly for 12 months

DIETARY_SUPPLEMENT

Ergocalciferol (vitamin D2)

oral capsule 50,000 IU once monthly for 12 months

DIETARY_SUPPLEMENT

Ergocalciferol (vitamin D2)

oral capsule 1600 IU once daily for 12 months

DIETARY_SUPPLEMENT

Cholecalciferol (vitamin D3)

oral capsule 1600 IU once daily for 12 months

DIETARY_SUPPLEMENT

Placebo

oral placebo capsule once daily for 12 months

Sponsors & Collaborators

  • University of Wisconsin, Madison

    lead OTHER

Principal Investigators

  • Neil Binkley, MD · University of Wisconsin - Institute on Aging

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Model
PARALLEL

Eligibility

Min Age
65 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2007-02-28
Primary Completion
2008-11-30
Completion
2008-11-30

Countries

  • United States

Study Locations

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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 NCT00692120 on ClinicalTrials.gov