# Impact of COVID-19 Vaccination on Serum 25-hydroxyvitamin D Level

> **NCT05398939** · — · COMPLETED · sponsor: **National Taiwan University Hospital** · enrollment: 20 (actual)

## Conditions studied

- Acne Vulgaris
- Vitamin D Deficiency
- COVID-19

## Interventions

- **DIAGNOSTIC_TEST:** Blood test and skin evaluation

## Key facts

- **NCT ID:** NCT05398939
- **Lead sponsor:** National Taiwan University Hospital
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2022-05-25
- **Primary completion:** 2022-07-04
- **Final completion:** 2022-11-29
- **Target enrollment:** 20 (ACTUAL)
- **Last updated:** 2024-04-16


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT05398939

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT05398939, "Impact of COVID-19 Vaccination on Serum 25-hydroxyvitamin D Level". Retrieved via AI Analytics 2026-09-07 from https://api.ai-analytics.org/clinical/NCT05398939. Licensed CC0.

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*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*