Medical Information Only. Always consult your healthcare provider before enrolling in any clinical trial.
NCT06610968 · ClinicalTrials.gov registry record · NA
Acute Vitamin D Supplementation on Testosterone in Females
A NA study of Female Hormone Profile, sponsored by University of Southern California.
- Recruiting
- Registry status
- NA
- Development phase
- 20
- Enrollment target
- 1
- Study location
NCT06610968: Recruiting NA study of Female Hormone Profile, sponsored by University of Southern California.
NCT06610968 is a NA study of Female Hormone Profile that is actively recruiting participants, run by University of Southern California. The registered enrollment target is 20 participants, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (99% lower). The trial reports 1 study location across 1 state. According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT06610968, a NA study of Female Hormone Profile, is actively recruiting participants, sponsored by University of Southern California.
- RECRUITING
- Registry status
- NA
- Development phase
- 20 participants
- Enrollment target
- 1
- Study location
Study Summary
Participation will take place over two visits to the Clinical Exercise Research Center (CERC) at the University of Southern California Health Sciences Campus. On the first visit, height, weight, and body composition by bioelectrical impedance are recorded. Questionnaires and withdrawal of a sample of blood (1 tablespoon) are also completed. The intervention begins the day following the first visit. The intervention protocol consists of three weeks of consuming either a placebo capsule or a 5000 IU Vitamin D capsule daily and completing a daily survey. The second visit to CERC immediately follows the 3-weeks intervention. In this visit, the same blood sampling protocol will be completed. The assignment of the intervention will be randomized (i.e., rolling a die), and participants are blinded to group assignment.
Primary Outcome
The primary objective is to evaluate the effect of acute Vitamin D supplementation on systemic Vitamin D, testosterone, and sex hormone modulators in pre-menopausal, healthy females. Circulating testosterone (total testosterone and free testosterone) concentrations (ng/dL) will be assessed via serum pre- and post-Vitamin D intervention.
Conditions Studied
Interventions
- DIETARY_SUPPLEMENT Vitamin D (Cholecalciferol )
- DIETARY_SUPPLEMENT Placebo Group
Study Locations (1)
California
- University of Southern California Health Sciences Campus Center for Health Professions - Los Angeles
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 20 participants |
| Start Date | 2025-07-01 |
| Est. Completion | 2026-01-30 |
| Phase | NA |
What NCT06610968 shows while recruiting
NCT06610968 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 20 participants, a relatively small participant target, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (99% lower).
The record links to 1 condition, with Female Hormone Profile appearing as the primary indexed condition, and to 2 interventions - of which Vitamin D (Cholecalciferol ) is the first listed.
NCT06610968 reports a single indexed study location in California.
Frequently Asked Questions
What is clinical trial NCT06610968 about?
NCT06610968 is a clinical study titled "Acute Vitamin D Supplementation on Testosterone in Females". Participation will take place over two visits to the Clinical Exercise Research Center (CERC) at the University of Southern California Health Sciences Campus. On the first visit, height, weight, and body composition by bioelectrical impedance are recorded. Questionnaires and withdrawal of a sample ...
What is the current status of trial NCT06610968?
This trial is currently recruiting. It is a NA study. The enrollment target is 20 participants. The study started on 2025-07-01. Estimated completion is 2026-01-30.
What conditions does trial NCT06610968 study?
This clinical trial studies the following conditions: Female Hormone Profile.
What interventions are being tested in trial NCT06610968?
The interventions under investigation include: Vitamin D (Cholecalciferol ) (DIETARY_SUPPLEMENT), Placebo Group (DIETARY_SUPPLEMENT).
Who is sponsoring clinical trial NCT06610968?
This trial is sponsored by University of Southern California, which has 617 total clinical trials registered on ClinicalTrials.gov.
Where is trial NCT06610968 being conducted?
This trial has 1 study location across California. Contact the study sites directly through ClinicalTrials.gov for enrollment availability.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT06610968's enrollment target sits among peer trials
20 1769th of 2000 higher than 140 of 2,000 other NA trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other NA trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
Nationwide trials with similar profiles
Cross-condition peers matched on enrollment target and registry start date, not the same-condition list above.
Similar enrollment target
- NCT00573339 · 20 participants
Cardiac Magnetic Resonance Imaging (MRI) Normal Reference Control Group Testing
- NCT00692939 · 20 participants · Phase 1
Autologous Stem Cell Transplantation for Crohn's Disease
- NCT00967785 · 20 participants · Phase 1
A Phase I Study of Mozobil in the Treatment of Patients With WHIMS
- NCT01406691 · 20 participants · Phase 4
Light Flashes to Treat Delayed Sleep Phase Disorder (DSPD)
Similar registry start date
- NCT05962346 · started 2026-12 · NA
Fetal Endoscopic Tracheal Occlusion for Congenital Diaphragmatic Hernia
- NCT07125183 · started 2026-12 · Phase 2
Study on Efficacy and Tolerability of Weekly Doxorubicin in Elderly Patients With Advanced or Metastatic Leiomyosarcoma
- NCT07292298 · started 2026-11 · Phase 2
Phase 2 Single-Arm Rectal Cancer Brachytherapy for Patients With Low-Lying Residual Adenocarcinoma After Total Neoadjuvant Therapy to Improve Organ Preservation Rates
- NCT04263285 · started 2026-10 · NA
Treatment of Depression Post-SCI