Medical Information Only. Always consult your healthcare provider before enrolling in any clinical trial.
NCT03437824 · ClinicalTrials.gov registry record · Early Phase 1
Effects of Vitamin B12 Treatment in Singers
A Early Phase 1 study, sponsored by University of Southern California.
- Completed
- Registry status
- Early Phase 1
- Development phase
- 20
- Enrollment target
NCT03437824: Completed Early Phase 1 study, sponsored by University of Southern California.
NCT03437824 is a Early Phase 1 study that has completed, run by University of Southern California. The registered enrollment target is 20 participants, below the 53-participant average among 2,764 other Early Phase 1 trials with a reported enrollment target (62% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT03437824, a Early Phase 1 study, has completed, sponsored by University of Southern California.
- COMPLETED
- Registry status
- Early Phase 1
- Development phase
- 20 participants
- Enrollment target
Study Summary
In this study, the investigators aim to assess if vitamin B12 treatment demonstrates a beneficial effect on voice performance. If so, they wish to examine the relationship between the vitamin B12 treatment and the study participant's general well-being.
Primary Outcome
1 = Not at All, 2 = Mildly, 3 = Moderately, 4 = Extremely
Interventions
- DRUG Placebo
- DRUG Cyanocobalamin
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 20 participants |
| Start Date | 2017-10-01 |
| Est. Completion | 2019-04-01 |
| Phase | Early Phase 1 |
What the finished NCT03437824 record still lists
NCT03437824 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 53-participant average among 2,764 other Early Phase 1 trials with a reported enrollment target (62% lower).
The record links to 0 conditions, and to 2 interventions - of which Placebo is the first listed.
NCT03437824 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT03437824 about?
NCT03437824 is a clinical study titled "Effects of Vitamin B12 Treatment in Singers". In this study, the investigators aim to assess if vitamin B12 treatment demonstrates a beneficial effect on voice performance. If so, they wish to examine the relationship between the vitamin B12 treatment and the study participant's general well-being.
What is the current status of trial NCT03437824?
This trial is currently completed. It is a Early Phase 1 study. The enrollment target is 20 participants. The study started on 2017-10-01. Estimated completion is 2019-04-01.
What interventions are being tested in trial NCT03437824?
The interventions under investigation include: Placebo (DRUG), Cyanocobalamin (DRUG).
Who is sponsoring clinical trial NCT03437824?
This trial is sponsored by University of Southern California, which has 617 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT03437824's enrollment target sits among peer trials
20 1157th of 2000 higher than 710 of 2,000 other Early Phase 1 trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other Early Phase 1 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