The Investigation of Vitamin D and Menstrual Cycles Trial, the inVitD Trial: A Phase II Clinical Trial
Public ClinicalTrials.gov record NCT05050916. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
The Investigation of Vitamin D and Menstrual Cycles Trial: A Phase II Clinical Trial
Study identification
- NCT ID
- NCT05050916
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Phase 2
- Lead sponsor
- National Institute of Environmental Health Sciences (NIEHS)
- NIH
- Enrollment
- 57 participants
Conditions and interventions
Conditions
Interventions
- Placebo Other
- Vitamin D Dietary Supplement
Other · Dietary Supplement
Eligibility (public fields only)
- Age range
- 19 Years to 40 Years
- Sex
- Female
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Mar 16, 2023
- Primary completion
- Jun 6, 2024
- Completion
- Jun 26, 2024
- Last update posted
- Feb 12, 2026
2023 – 2024
United States locations
- U.S. sites
- 2
- U.S. states
- 2
- U.S. cities
- 2
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Henry Ford Health System | Detroit | Michigan | 48187 | — |
| NIEHS Clinical Research Unit (CRU) | Research Triangle Park | North Carolina | 27709 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT05050916, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Feb 12, 2026 · Synced May 19, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT05050916 live on ClinicalTrials.gov.