Research
Cellular
Ingestion of a single bolus of hydrolyzed collagen or free amino acids substantially increases circulating amino acids concentrations, particularly glycine.
Practitioners can consider collagen and amino acid supplementation to enhance amino acid availability post-exercise.
StrongSupportsmedium confidence
The ingestion of a single bolus of collagen hydrolysate or free amino acids substantially increases circulating amino acids concentrations, particularly glycine.
Why this rating
Based on study design from abstract.
Source
The Effects of Ingesting a Single Bolus of Hydrolyzed Collagen versus Free Amino Acids on Muscle Connective Protein Synthesis Rates
Thorben Aussieker et al. · Medicine & Science in Sports & Exercise · 2025
DOI 10.1249/mss.0000000000003788
rct · n=45Cited 2×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- Collagen and free amino acid ingestion did not significantly increase myofibrillar protein synthesis rates in either rested or exercised legs.Strong
- Collagen and free amino acid ingestion did not significantly increase muscle connective protein synthesis rates in either rested or exercised legs.Strong
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