# Vitamin D and Mammographic Breast Density

> **NCT01747720** · NA · COMPLETED · sponsor: **CHU de Quebec-Universite Laval** · enrollment: 405 (actual)

## Conditions studied

- Breast Cancer

## Interventions

- **DIETARY_SUPPLEMENT:** Vitamin D3
- **DIETARY_SUPPLEMENT:** Placebo

## Key facts

- **NCT ID:** NCT01747720
- **Lead sponsor:** CHU de Quebec-Universite Laval
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2012-10
- **Primary completion:** 2017-05
- **Final completion:** 2017-05-17
- **Target enrollment:** 405 (ACTUAL)
- **Last updated:** 2017-05-24

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT01747720

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT01747720, "Vitamin D and Mammographic Breast Density". Retrieved via AI Analytics 2026-05-26 from https://api.ai-analytics.org/clinical/NCT01747720. Licensed CC0.

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*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*