# Liver and Bone Retinol Levels in Guatemalan Adolescents and Adults

> **NCT04438200** · — · UNKNOWN · sponsor: **Newcastle University** · enrollment: 150 (estimated)

## Conditions studied

- Vitamin A Deficiency
- Vitamin A Toxicity
- Hypervitaminosis A

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT04438200
- **Lead sponsor:** Newcastle University
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** UNKNOWN
- **Start date:** 2019-10-24
- **Primary completion:** 2020-07
- **Final completion:** 2020-07
- **Target enrollment:** 150 (ESTIMATED)
- **Last updated:** 2020-06-18

## Collaborators

- [object Object]
- [object Object]
- [object Object]
- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04438200

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04438200, "Liver and Bone Retinol Levels in Guatemalan Adolescents and Adults". Retrieved via AI Analytics 2026-06-24 from https://api.ai-analytics.org/clinical/NCT04438200. Licensed CC0.

---

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