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Vitamin D Supplementation to Obese Chinese Males

This study has been completed.
Sponsor:
ClinicalTrials.gov Identifier:
NCT01781169
First Posted: January 31, 2013
Last Update Posted: October 30, 2013
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Collaborator:
Danone Institute China Diet Nutrition Research and Communication
Information provided by (Responsible Party):
Zhou Ji-Chang, Shenzhen Center for Chronic Disease Control
  Purpose

Hypothesis: Oral Supplementation of Vitamin D can Reduce Hypersecretion of Parathyroid Hormone and Insulin Resistance in Obese Chinese Males.

Protocol: Weekly oral supplementation of 50,000 IU vitamin D (cholecalciferol) or eight weeks to the obese males compared with the normal-weight males. Index measures were conducted at baseline and endpoint.


Condition Intervention
Obesity Insulin Resistance Dietary Supplement: Oral supplementation of vitamin D

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Health Services Research
Official Title: Health Effect of Oral Vitamin D Supplementation on Obese Chinese Males

Resource links provided by NLM:


Further study details as provided by Zhou Ji-Chang, Shenzhen Center for Chronic Disease Control:

Primary Outcome Measures:
  • Plasma 25-hydroxy Vitamin D (25(OH)D) Level (Nmol/L) [ Time Frame: Endpoint and baseline of the 8 weeks' trial ]

Enrollment: 43
Study Start Date: April 2011
Study Completion Date: December 2012
Primary Completion Date: December 2011 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Obese group
Oral supplementation of vitamin D (cholecalciferol), 50000 IU/wk for 8 weeks.
Dietary Supplement: Oral supplementation of vitamin D
Weekly oral supplementation of 50,000 IU vitamin D (cholecalciferol) for eight weeks to the obese males compared with the normal-weight males. The chemical form of vitamin D is cholecalciferol capsuled as fine powder.
Experimental: Normal-weight group
Oral supplementation of vitamin D (cholecalciferol), 50000 IU/wk for 8 weeks.
Dietary Supplement: Oral supplementation of vitamin D
Weekly oral supplementation of 50,000 IU vitamin D (cholecalciferol) for eight weeks to the obese males compared with the normal-weight males. The chemical form of vitamin D is cholecalciferol capsuled as fine powder.

  Eligibility

Information from the National Library of Medicine

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Ages Eligible for Study:   23 Years to 66 Years   (Adult, Senior)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • body mass index (BMI) ≥ 28kg/m2 or 18.5 ≤ BMI < 24 (kg/m2)
  • non vegetarian Han Chinese and did not smoke, drink, nor take vitamin D supplements for > 2 y
  • fasting serum glucose < 7.0 mmol/L
  • serum glucose of 2 hr after 75 g oral glucose loading < 11.1 mmol/L
  • normal functioning of liver and kidney evaluated by alkaline phosphatase, aspartate aminotransferase, creatinine, and uric acid

Exclusion Criteria:

  • not match the above inclusion criteria
  • diagnosed as having any organic diseases were excluded
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01781169


Locations
China, Guangdong
Shenzhen Center for Chronic Disease Control
Shenzhen, Guangdong, China, 518020
Sponsors and Collaborators
Shenzhen Center for Chronic Disease Control
Danone Institute China Diet Nutrition Research and Communication
Investigators
Principal Investigator: Ji-Chang Zhou, Ph.D Shenzhen Center for Chronic Disease Control
  More Information

Publications:
Responsible Party: Zhou Ji-Chang, Vice Dean of Molecular Biology Lab, Shenzhen Center for Chronic Disease Control
ClinicalTrials.gov Identifier: NCT01781169     History of Changes
Other Study ID Numbers: VD50kIU2011
First Submitted: January 25, 2013
First Posted: January 31, 2013
Results First Submitted: May 29, 2013
Results First Posted: September 30, 2013
Last Update Posted: October 30, 2013
Last Verified: September 2013

Keywords provided by Zhou Ji-Chang, Shenzhen Center for Chronic Disease Control:
Vitamin D,
Oral supplementation,
Obese males

Additional relevant MeSH terms:
Insulin Resistance
Hyperinsulinism
Glucose Metabolism Disorders
Metabolic Diseases
Vitamins
Vitamin D
Ergocalciferols
Cholecalciferol
Micronutrients
Growth Substances
Physiological Effects of Drugs
Bone Density Conservation Agents