# High-dose Vitamin D Supplements in Older Adults

> **NCT03613116** · PHASE2 · ACTIVE_NOT_RECRUITING · sponsor: **University of California, Davis** · enrollment: 180 (estimated)

## Conditions studied

- Vitamin D Deficiency
- Cognitive Decline

## Interventions

- **DIETARY_SUPPLEMENT:** Vitamin D3

## Key facts

- **NCT ID:** NCT03613116
- **Lead sponsor:** University of California, Davis
- **Sponsor class:** OTHER
- **Phase:** PHASE2
- **Study type:** INTERVENTIONAL
- **Status:** ACTIVE_NOT_RECRUITING
- **Start date:** 2019-03-18
- **Primary completion:** 2026-12-31
- **Final completion:** 2026-12-31
- **Target enrollment:** 180 (ESTIMATED)
- **Last updated:** 2026-04-03

## Collaborators

- [object Object]
- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT03613116

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT03613116, "High-dose Vitamin D Supplements in Older Adults". Retrieved via AI Analytics 2026-07-20 from https://api.ai-analytics.org/clinical/NCT03613116. Licensed CC0.

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