# Vitamin D3 Supplementation to Prevent Respiratory Tract Infections

> **NCT04596657** · NA · COMPLETED · sponsor: **The Cooper Health System** · enrollment: 877 (actual)

## Conditions studied

- Respiratory Tract Infections
- Covid19
- Flu Like Illness

## Interventions

- **DIETARY_SUPPLEMENT:** Vitamin D supplementation

## Key facts

- **NCT ID:** NCT04596657
- **Lead sponsor:** The Cooper Health System
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2020-10-27
- **Primary completion:** 2021-11-23
- **Final completion:** 2023-10-19
- **Target enrollment:** 877 (ACTUAL)
- **Last updated:** 2023-12-08

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04596657

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04596657, "Vitamin D3 Supplementation to Prevent Respiratory Tract Infections". Retrieved via AI Analytics 2026-06-03 from https://api.ai-analytics.org/clinical/NCT04596657. Licensed CC0.

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