http://nutritionstudies.org/animal-vs-plant-protein/ http://nutritionstudies.org/animal-vs-plant-protein/ https://en.wikipedia.org/wiki/Essential_amino_acid#Rel

http://nutritionstudies.org/animal-vs-plant-protein/ http://nutritionstudies.org/animal-vs-plant-protein/ https://en.wikipedia.org/wiki/Essential_amino_acid#Relative_amino_acid_composition_of_protein_sources https://en.wikipedia.org/wiki/Essential_amino_acid#Relative_... the prevailing theory (which makes sense to me, fwiw) is that protein from meat has a much closer amino acid profile to human muscle compared to protein from plants.