Trial reportNutrients2019
Prolonged Collagen Peptide Supplementation and Resistance Exercise Training Affects Body Composition in Recreationally Active Men.
Trial report in Nutrients, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers, 3 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
26 citing papers in PubMed, 3 syntheses or guidelines pooled it, 51 citations in OpenAlex.
- Impact of Collagen Peptide Supplementation in Combination with Long-Term Physical Training on Strength, Musculotendinous Remodeling, Functional Recovery, and Body Composition in Healthy Adults: A Systematic Review with Meta-analysis.Sports medicine (Auckland, N.Z.) · 2024Pooled it
- Systematic review and meta-analysis of protein intake to support muscle mass and function in healthy adults.Journal of cachexia, sarcopenia and muscle · 2022Pooled it
- The effects of collagen peptide supplementation on body composition, collagen synthesis, and recovery from joint injury and exercise: a systematic review.Amino acids · 2021Pooled it
- High-intensity resistance training and collagen supplementation improve patellar tendon adaptations in professional female soccer athletes.Experimental physiology · 2025Trial
- The effects of collagen peptide supplementation on appetite and post-exercise energy intake in females: a randomised controlled trial.The British journal of nutrition · 2025Trial
- The effect of specific bioactive collagen peptides on function and muscle remodeling during human resistance training.Acta physiologica (Oxford, England) · 2023Trial
- A collagen hydrolysate/milk protein-blend stimulates muscle anabolism equivalently to an isoenergetic milk protein-blend containing a greater quantity of essential amino acids in older men.Clinical nutrition (Edinburgh, Scotland) · 2021Trial
- The Influence of Specific Bioactive Collagen Peptides on Body Composition and Muscle Strength in Middle-Aged, Untrained Men: A Randomized Controlled Trial.International journal of environmental research and public health · 2021Trial
- Trial
- Collagen Supplementation on Tendon-Related Structural and Performance Outcomes: A Systematic Review.Journal of functional morphology and kinesiology · 2026Review
- Specific collagen peptides supplementation increases collagen type I content in skeletal muscle after 12 weeks of high-load resistance training: a randomized controlled trial.Frontiers in physiology · 2026Article
- Which Protein-Based Dietary Supplements Most Effectively Enhance Fat-Free Mass and Strength Gains in Healthy Adults Undergoing Resistance Training? A Network Meta-Analysis.Translational sports medicine · 2026Review
- Effects of 24 weeks of collagen supplementation in active adults: Impact on body composition, neuromuscular and cardiorespiratory fitness.Biology of sport · 2025Article
- The Effects of Type I Collagen Hydrolysate Supplementation on Bones, Muscles, and Joints: A Systematic Review.Orthopedic reviews · 2025Article
- Efficacy of collagen peptide supplementation on bone and muscle health: a meta-analysis.Frontiers in nutrition · 2025Review
- Effects of Paraspinal Intramuscular Injection of Atelocollagen in Patients with Chronic Low Back Pain: A Retrospective Observational Study.Journal of clinical medicine · 2024Article
- Review
- The Preventive Effect of Specific Collagen Peptides against Dexamethasone-Induced Muscle Atrophy in Mice.Molecules (Basel, Switzerland) · 2023Article
- Collagen supplementation augments changes in patellar tendon properties in female soccer players.Frontiers in physiology · 2023Article
- Marine-derived protein: peptide bioresources for the development of nutraceuticals for improved athletic performance.Frontiers in sports and active living · 2023Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors at 2 institutions in 1 country.
Funding
Abstract
We aimed to determine the effects of long-term collagen peptide (CP) supplementation and resistance exercise training (RET) on body composition, strength, and muscle fiber cross-sectional area (fCSA) in recreationally active men. Fifty-seven young men were randomly and double-blinded divided into a group receiving either collagen peptides (COL, 15 g/day) or a placebo (PLA). Strength testing, bioimpedance analysis, and muscle biopsies were used prior to and after an RET intervention. Food record protocols were performed during the RET intervention. The groups trained three times a week for 12 weeks. Baseline parameters showed no differences between groups, and the external training load and dietary food intake were also similar. COL showed a significant increase in fat-free mass (FFM) compared with the placebo group (
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What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.