# Magnitude of Changes in 25 OH Vitamin D3 Levels After Vitamin D3 Supplementation

> **NCT01170507** · PHASE1,PHASE2 · WITHDRAWN · sponsor: **King Faisal Specialist Hospital & Research Center**

## Conditions studied

- Vitamin D Deficiency

## Interventions

- **DRUG:** vitamin D3 1000 IU orally daily for 5 months
- **DRUG:** vitamin D3 3000 IU orally daily for 5 months
- **DRUG:** vitamin D3 5000 IU orally daily for 5 months
- **DRUG:** Placebo orally daily for 5 months

## Key facts

- **NCT ID:** NCT01170507
- **Lead sponsor:** King Faisal Specialist Hospital & Research Center
- **Sponsor class:** OTHER
- **Phase:** PHASE1,PHASE2
- **Study type:** INTERVENTIONAL
- **Status:** WITHDRAWN
- **Start date:** 2011-12
- **Primary completion:** 2016-08
- **Final completion:** 2016-08
- **Target enrollment:** 0 (ACTUAL)
- **Why stopped:** No funding
- **Last updated:** 2018-03-07


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT01170507

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT01170507, "Magnitude of Changes in 25 OH Vitamin D3 Levels After Vitamin D3 Supplementation". Retrieved via AI Analytics 2026-05-28 from https://api.ai-analytics.org/clinical/NCT01170507. Licensed CC0.

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