# Comparison of Sunlight Exposure and Vitamin D Supplementation on Serum 25-hydroxyvitamin D Levels

> **NCT03310242** · NA · COMPLETED · sponsor: **Seoul National University Hospital** · enrollment: 150 (actual)

## Conditions studied

- Vitamin D Deficiency
- Cardiometabolic Risk Factors

## Interventions

- **BEHAVIORAL:** Sunlight Exposure
- **DIETARY_SUPPLEMENT:** Vitamin D Supplementation
- **OTHER:** Placebo

## Key facts

- **NCT ID:** NCT03310242
- **Lead sponsor:** Seoul National University Hospital
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2015-06-01
- **Primary completion:** 2015-11-25
- **Final completion:** 2015-11-30
- **Target enrollment:** 150 (ACTUAL)
- **Last updated:** 2017-10-31


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT03310242

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT03310242, "Comparison of Sunlight Exposure and Vitamin D Supplementation on Serum 25-hydroxyvitamin D Levels". Retrieved via AI Analytics 2026-06-03 from https://api.ai-analytics.org/clinical/NCT03310242. Licensed CC0.

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