Vitamin D in Postmenopausal Women at High Risk for Breast Cancer

ClinicalTrials.gov ID: NCT00859651

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Official title

Effects of High-Dose Vitamin D on Circulating Vitamin D Levels and Breast Density in Postmenopausal Women at High Risk for Breast Cancer Development

Brief summary

Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.

This is a phase II study which will enroll 20 postmenopausal women who are at high risk for breast cancer development. The goal is to determine whether a one-year intervention of high-dose vitamin D at 2 different doses (20,000 IU weekly or 30,000 IU weekly) will increase circulating blood levels of vitamin D and to obtain preliminary data on the biologic effects of vitamin D for breast cancer prevention.

Study identification

NCT ID: NCT00859651
Recruitment status: Completed
Study type: Interventional
Phase: Phase 2
Lead sponsor: Columbia University; Other
Enrollment: 20 participants

Conditions and interventions

Conditions

Breast Cancer

Interventions

Cholecalciferol Drug
Placebo capsule Drug

Drug

Eligibility (public fields only)

Age range: 21 Years and older
Sex: Female
Healthy volunteers: Accepts healthy volunteers

This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.

Study timeline

Start date: Jun 2009 (Type not available)
Primary completion: Apr 2015 (Actual)
Completion: Apr 2015 (Actual)
Last update posted: Sep 27, 2017

2009 – 2015

United States locations

U.S. sites: 1
U.S. states: 1
U.S. cities: 1

Facility	City	State	ZIP	Site status
Columbia University	New York	New York	10032	—

Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.

About this trial record page

What this page shows: Public field values for ClinicalTrials.gov record NCT00859651, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
What this page does not do: No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
Where the data comes from: Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
Last refresh: Last update posted Sep 27, 2017 · Synced Nov 12, 2026