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Effect of a Single Colecalciferol Dose on Insulin Resistance

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified February 2010 by Hospital de Clinicas de Porto Alegre.
Recruitment status was:  Enrolling by invitation
Information provided by:
Hospital de Clinicas de Porto Alegre Identifier:
First received: February 23, 2010
Last updated: NA
Last verified: February 2010
History: No changes posted
A Prospective Double-Blinded, Placebo Controlled, Randomized Trial comparing a single dose of Vitamin D (Colecalciferol) 300.00UI to placebo on patients with insulin resistance. Primary Outcome: Blood glucose and homeostasis model assessment for insulin resistance (HOMA-R) after 90 days. Study hypothesis: Vitamin D treatment may improve insulin resistance and decrease glucose level, since there is an association between hypovitaminosis D and increased insulin resistance.

Condition Intervention
Insulin Resistance
Glucose Intolerance
Drug: Colecalciferol (Vitamin D3) 300.000 UI
Drug: Placebo

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double Blind (Participant, Care Provider, Investigator)
Primary Purpose: Treatment
Official Title: Effect of a Single Colecalciferol Dose on Insulin Resistance: A Prospective Randomized Trial

Resource links provided by NLM:

Further study details as provided by Hospital de Clinicas de Porto Alegre:

Primary Outcome Measures:
  • Blood Glucose Level [ Time Frame: Baseline and day 90 ]

Secondary Outcome Measures:
  • Blood Calcium Level [ Time Frame: Baseline and day 90 ]
  • HOMA-R [ Time Frame: Baseline and day 90 ]

Estimated Enrollment: 136
Study Start Date: May 2009
Estimated Study Completion Date: July 2010
Estimated Primary Completion Date: July 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Vitamin D Drug: Colecalciferol (Vitamin D3) 300.000 UI
Colecalciferol (Vitamin D3) 300.000 UI Capsule, Single Dose
Placebo Comparator: Placebo Drug: Placebo
Placebo Capsule, Single Dose


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Fasten Blood Glucose > 100 mg/dL and < 126 mg/dL
  • Age > 18 years

Exclusion Criteria:

  • Diabetes Mellitus
  • Use of metformin
  • Vitamin D Use
  • Hypercalcemia
  • Chronic Hepatitis
  • HIV
  Contacts and Locations
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Please refer to this study by its identifier: NCT01075022

Hospital de Clínicas de Porto Alegre
Porto Alegre, Rio Grande do Sul, Brazil, 90035-903
Sponsors and Collaborators
Hospital de Clinicas de Porto Alegre
Study Director: Tania Furlanetto, PhD Federal University of Rio Grande do Sul
  More Information

Responsible Party: Gustavo Faulhaber, Hospital de Clínicas de Porto Alegre Identifier: NCT01075022     History of Changes
Other Study ID Numbers: 33598290
Study First Received: February 23, 2010
Last Updated: February 23, 2010

Additional relevant MeSH terms:
Insulin Resistance
Glucose Intolerance
Glucose Metabolism Disorders
Metabolic Diseases
Vitamin D
Growth Substances
Physiological Effects of Drugs
Bone Density Conservation Agents processed this record on May 25, 2017