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The Effect of Vitamin D Supplementation on Cardiovascular Risk Factors Among Hispanics and African Americans With Type 2 Diabetes Mellitus

This study has been completed.
Information provided by (Responsible Party):
Fatma Ercanli-Huffman, Florida International University Identifier:
First received: August 7, 2011
Last updated: March 24, 2015
Last verified: March 2015
The purpose of the present pilot study is to determine the effect of vitamin D supplementation (4000 IU or 6000 IU once daily for 6 months) on reducing heart disease risk and in improving blood glucose control in type 2 Diabetes subjects . The investigators are working with Hispanics and African Americans living in Miami, Florida.

Condition Intervention
Type 2 Diabetes
Drug: Cholecalciferol

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: Open Label
Official Title: The Effect of Vitamin D Supplementation on Cardiovascular Risk Factors Among Hispanics and African Americans With Type 2 Diabetes

Resource links provided by NLM:

Further study details as provided by Florida International University:

Primary Outcome Measures:
  • Cardiovascular disease risk measures [ Time Frame: 6 months ]
    High sensitivity C-reactive protein, Lipid Panel will be used as surrogate measures for cardiovascular disease risk.

Secondary Outcome Measures:
  • Glycemic Control [ Time Frame: 6 months ]
    A1C, plasma Insulin levels, plasma glucose levels will be used for testing for glycemic control.

Enrollment: 92
Study Start Date: July 2011
Study Completion Date: August 2013
Primary Completion Date: August 2013 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Intervention group
This group will be given Vitamin D for 6 months. All the study participants will be enrolled in this group.
Drug: Cholecalciferol
4000 IU or 6000 IU given once daily, orally for 6 months.
Other Name: Vitamin D

Detailed Description:

Insufficient vitamin D levels have been found in subjects with type 2 diabetes (T2D). Similarly, a negative association between serum vitamin D levels and insulin resistance has been reported in a large sample representative of the adult US population and in subjects at risk for T2D. In addition, a strong association between hypovitaminosis D and hypertriglyceridemia has been demonstrated in studies done in US adult population.

Literature has indicated that subjects with T2D and insulin resistance (IR) are more likely to develop arteriosclerosis and all of the complications related to this condition, such as myocardial infarction and stroke.

These findings have increased the interest about the effect of vitamin D on metabolic abnormalities grouped under the term "cardiovascular disease (CVD) risk factors", which includes hypertension, dyslipidemia, obesity, glucose intolerance, inflammation and T2D which is in itself a risk factor for CVD.

Therefore, the purpose of the present pilot study will be to determine the effect of supplemental vitamin D intake (4000 IU or 6000 IU of Cholecalciferol daily for 6 months) on CVD risk markers and glycemic control; primarily lipid panel, insulin resistance, and glycosylated hemoglobin (A1C), in a sample of Hispanics and African-Americans with T2D and vitamin D insufficiency. If repletion of vitamin D level improves insulin resistance, glycemic control, inflammation, hypertension, dyslipidaemia or kidney functions, it may prevent the development of CVD events and decrease T2D complications.


Ages Eligible for Study:   30 Years to 70 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Type 2 diabetes
  • African American or Hispanic
  • able to ambulate on their own
  • aged between 30 - 70 years

Exclusion Criteria:

  • Taking Supplemental Vitamin D
  • Pregnant or Lactating women
  • Receiving insulin therapy
  • Not participating in other drug trials
  • HIV/ hepatitis/ cancer/ liver disease/ heart failure/ any recent surgery/ mental illness/ epilepsy/ any GI or malabsorption disorders
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Please refer to this study by its identifier: NCT01412710

United States, Florida
Human Nutrition Laboratory, Florida International University
Miami, Florida, United States, 33199
Sponsors and Collaborators
Florida International University
Principal Investigator: Fatma G Huffman, PhD Florida International University
  More Information

Responsible Party: Fatma Ercanli-Huffman, Dr. Fatma G. Huffman, Florida International University Identifier: NCT01412710     History of Changes
Other Study ID Numbers: FIU-032511-01
Study First Received: August 7, 2011
Last Updated: March 24, 2015

Keywords provided by Florida International University:
Type 2 Diabetes
Vitamin D
Insulin resistance
Cardiovascular disease risk

Additional relevant MeSH terms:
Diabetes Mellitus
Diabetes Mellitus, Type 2
Glucose Metabolism Disorders
Metabolic Diseases
Endocrine System Diseases
Vitamin D
Growth Substances
Physiological Effects of Drugs
Bone Density Conservation Agents processed this record on April 27, 2017