Muscle protein synthesis
May support muscle protein synthesis as a complete protein source. The amino acid profile of duck muscle is comparable to other poultry, and the supporting trials concern high-quality animal protein as a group rather than duck.
Moderate evidence. Several human studies point the same way, with real caveats.
1 source
- The effect of chronic soluble keratin supplementation in physically active individuals on body composition, blood parameters and cycling performance.(opens in a new tab)
Randomised controlled trial · Journal of the International Society of Sports Nutrition · 2018 · PMID 30261892
Deep research mode adds each paper’s own conclusion and stated limitations.