Completed NA INTERVENTIONAL 3-arm NCT01524874

Comparative Effectiveness of Vitamin D and Repletion Strategies (CEDARS)

A Comparative Effectiveness Trial of High-quality Vitamin D3 Nutritional Supplements to Replete Serum Vitamin D

Sponsor: Bastyr University

Conditions Diabetes Hypovitaminosis D Insulin Resistance

Interventions Vitamin D3

Updated 6 times since 2017 Last updated: Jan 31, 2012 Started: Aug 31, 2010 Primary completion: Sep 30, 2011 Completion: Nov 30, 2011

This information is for research purposes only and is not medical advice. Consult a healthcare provider before making any medical decision.

A NA clinical study on Diabetes and Hypovitaminosis D, this trial is completed. The trial is conducted by Bastyr University and has accumulated 6 data snapshots since 2010. Longitudinal tracking of this trial contributes to a broader understanding of treatment development timelines.

Status Flow

Change History

6 versions recorded

Sep 2025 — Present [monthly]

Completed NA
Sep 2024 — Sep 2025 [monthly]

Completed NA
Jul 2024 — Sep 2024 [monthly]

Completed NA
Jan 2021 — Jul 2024 [monthly]

Completed NA
Jun 2018 — Jan 2021 [monthly]

Completed NA

▶ Show 1 earlier version

Jan 2017 — Jun 2018 [monthly]

Completed NA

First recorded

Aug 2010

Trial started

Per CT.gov start date — pre-dates our first snapshot

Eligibility Summary

No eligibility information available.

Contact Information

Sponsor contact:

Bastyr University
Diabetes Action Research and Education Foundation

Data source: Bastyr University

For direct contact, visit the study record on ClinicalTrials.gov .

Study Locations

• Kailua-Kona, United States
• Kenmore, United States