Animal, Plant, Collagen and Blended Dietary Proteins: Effects on Musculoskeletal Outcomes.
Level 5 - mechanism / opinion, no new human data
Narrative review synthesizing mechanistic and comparative evidence without a systematic review protocol or meta-analysis.
PubMed 32883033 · doi:10.3390/nu12092670
What was done
This review evaluated the effects of animal-, plant-, collagen-derived, and blended dietary proteins on muscle and bone metabolism, with a focus on aging, exercise, and energy restriction. Methodological details such as search strategy or study selection criteria were not described in the abstract.
What was found
No quantitative data, effect estimates, or sample sizes were reported in the abstract. The authors state that animal-derived proteins stimulate robust increases in muscle protein synthesis and support bone accretion due to rapid digestion kinetics, whereas plant and collagen proteins exhibit a lower anabolic profile due to lower digestibility and inferior essential amino acid composition, particularly leucine.
Why it matters
This paper summarizes qualitative differences across traditional and emerging protein sources to guide nutritional strategies for preserving musculoskeletal mass and function.
Limits
The abstract contains no numerical results, effect sizes, or details regarding the number or design of reviewed studies. As a narrative review, it lacks a systematic methodology and risk of bias assessment.
Cited by
- supports Collagen protein contains less than 3% leucine, making it a poor driver of muscle protein synthesis compared to whole proteins.