# Effect of Vitamin D3 Supplementation on Insulin Resistance- The DIR Study

> **NCT01889810** · NA · COMPLETED · sponsor: **Queen's University, Belfast** · enrollment: 81 (actual)

## Conditions studied

- Sub-optimal Vitamin D Status
- Pre-diabetes
- Insulin Resistance

## Interventions

- **DIETARY_SUPPLEMENT:** Vitamin D3 supplementation

## Key facts

- **NCT ID:** NCT01889810
- **Lead sponsor:** Queen's University, Belfast
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2013-08
- **Primary completion:** 2016-06
- **Final completion:** 2016-06
- **Target enrollment:** 81 (ACTUAL)
- **Last updated:** 2023-05-06

## Collaborators

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## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT01889810

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT01889810, "Effect of Vitamin D3 Supplementation on Insulin Resistance- The DIR Study". Retrieved via AI Analytics 2026-07-28 from https://api.ai-analytics.org/clinical/NCT01889810. Licensed CC0.

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