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Vitamin D, Glucose Control and Insulin Sensitivity in African-Americans

NCT00784511 · Status: COMPLETED · Phase: PHASE2 · Type: INTERVENTIONAL · Enrollment: 100

Last updated 2014-11-14

No results posted yet for this study

Summary

North American blacks tend to have low blood levels of vitamin D because pigmentation blocks vitamin D production in the skin. They also have higher rates of developing type 2 diabetes and higher rates of complications from the disease compared with whites. Although there is compelling evidence that adequate vitamin D may reduce the risk for type 2 diabetes in whites, recent evidence from a national survey demonstrated an association of vitamin D with diabetes in whites but not in blacks. However, the central hypothesis of this study is that providing enough supplemental vitamin D to blacks (raising their blood levels higher than that of most participants in the survey) will improve blood measures related to diabetes risk. The proposed study is a 12-week randomized, double-blind, placebo-controlled experiment designed to examine the effect of vitamin D supplementation (100 μg/d ) on insulin secretion, insulin sensitivity and glucose control in pre-diabetic black men and women aged 40 and older.

Conditions

Interventions

DIETARY_SUPPLEMENT

cholecalciferol

4000 IU/d

OTHER

microcrystalline cellulose

1/d

Sponsors & Collaborators

  • Tufts University

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
QUADRUPLE
Model
PARALLEL

Eligibility

Min Age
40 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2008-07-31
Primary Completion
2011-02-28
Completion
2011-02-28

Countries

  • United States

Study Locations

More Related Trials

Entities

Diseases

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 NCT00784511 on ClinicalTrials.gov