Medical Information Only. Always consult your healthcare provider before enrolling in any clinical trial.
NCT03357432 · ClinicalTrials.gov registry record · NA
Gelatin, Collagen, Gummy and PINP
A NA study, sponsored by University of California, Davis.
- Completed
- Registry status
- NA
- Development phase
- 11
- Enrollment target
NCT03357432: Completed NA study, sponsored by University of California, Davis.
NCT03357432 is a NA study that has completed, run by University of California, Davis. The registered enrollment target is 11 participants, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (99% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT03357432, a NA study, has completed, sponsored by University of California, Davis.
- COMPLETED
- Registry status
- NA
- Development phase
- 11 participants
- Enrollment target
Study Summary
Previous work has shown that gelatin supplementation could increase collagen synthesis in humans. In this study subjects consume placebo, 5 or 15 g of gelatin with a standard amount of vitamin C (48 mg) 1 hour before 6 minutes of jump rope exercise. The feeding and exercise intervention was repeated every 6 hours while the subjects were awake for three days and the amount of the amino terminal procollagen I peptide (PINP) was determined; a marker of collagen synthesis, in the blood. Consistent with the hypothesis that gelatin increases collagen synthesis in humans; the amount of PINP in the 15 g gelatin group was significantly higher than either the placebo or the 5 g groups. These data conclusively demonstrate that gelatin supplementation can increase exercise-induced collagen synthesis in humans. Hydrolyzed collagen has a similar amino acid profile, in particular with high concentrations of glycine, proline, hydroxyproline, and arginine. Thus, the current study aims to determine is the same dose of gelatin, hydrolyzed collagen and a gelatin/collagen mix, all with a standard dose of vitamin C effect PINP levels similarly.
Primary Outcome
To determine optimal dose of supplemental hydrolyzed collagen and vitamin C required to maximally elevate PINP levels (a marker of collagen synthesis) in healthy athletes.
Interventions
- OTHER gelatin, collagen, gummy dose
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 11 participants |
| Start Date | 2017-10-21 |
| Est. Completion | 2018-09-07 |
| Phase | NA |
What the finished NCT03357432 record still lists
NCT03357432 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 11 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 0 conditions, and to 1 intervention - of which gelatin, collagen, gummy dose is the first listed.
NCT03357432 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT03357432 about?
NCT03357432 is a clinical study titled "Gelatin, Collagen, Gummy and PINP". Previous work has shown that gelatin supplementation could increase collagen synthesis in humans. In this study subjects consume placebo, 5 or 15 g of gelatin with a standard amount of vitamin C (48 mg) 1 hour before 6 minutes of jump rope exercise. The feeding and exercise intervention was repeated...
What is the current status of trial NCT03357432?
This trial is currently completed. It is a NA study. The enrollment target is 11 participants. The study started on 2017-10-21. Estimated completion is 2018-09-07.
What interventions are being tested in trial NCT03357432?
The interventions under investigation include: gelatin, collagen, gummy dose (OTHER).
Who is sponsoring clinical trial NCT03357432?
This trial is sponsored by University of California, Davis, which has 657 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT03357432's enrollment target sits among peer trials
11 1927th of 2000 higher than 74 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
- NCT03114462 · 11 participants · Phase 1
Trial of Stereotactic HYpofractionateD RadioAblative (HYDRA) Treatment of Laryngeal Cancer
- NCT06039709 · 11 participants · Phase 1
Sonodynamic Therapy in Patients With Recurrent GBM
- NCT06425380 · 11 participants · NA
Pilot Open-Label Trial of Resistant Potato Starch in Patients With Cirrhosis and Overt Hepatic Encephalopathy
- NCT06472661 · 11 participants · Early Phase 1
FUSA With Intratumoral PolyICLC in Regionally Advanced Resectable Melanoma
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