Collagen Vitamin C Dose Response Performance
Public ClinicalTrials.gov record NCT03293004. 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
Effects of Hydrolyzed Collagen and Vitamin C on Collagen Synthesis and Explosive Performance
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
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 precisely map out the dose response relationship of hydrolyzed collagen and vitamin C on PINP and to determine the optimal dose to achieve maximal increased in PINP levels.
Study identification
- NCT ID
- NCT03293004
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Not applicable
- Enrollment
- 23 participants
Conditions and interventions
Conditions
Interventions
- Hydrolyzed collagen Dietary Supplement
- Vitamin C Dietary Supplement
- Optimized Hydrolyzed Collagen and Vitamin C Dietary Supplement
- Gummy Placebo Dietary Supplement
Dietary Supplement
Eligibility (public fields only)
- Age range
- 18 Years to 25 Years
- Sex
- Male
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Sep 12, 2017
- Primary completion
- May 23, 2018
- Completion
- May 23, 2018
- Last update posted
- Aug 20, 2018
2017 – 2018
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| University of California Davis | Davis | California | 95616 | — |
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 NCT03293004, 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 Aug 20, 2018 · Synced Sep 2, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT03293004 live on ClinicalTrials.gov.