Composition of Amino Acids in Foodstuffs for Humans and Animals.
Level 5 - mechanism / opinion, no new human data
Narrative review without systematic methodology or primary human trial data.
PubMed 34251645 · doi:10.1007/978-3-030-74180-8_11
What was done
This paper reviews the proteinogenic amino acid composition of plant- and animal-derived foodstuffs and feedstuffs consumed by humans, livestock, poultry, fish, and crustaceans, alongside physiological dietary requirements.
What was found
The abstract reports no numerical values. It states that both plant- and animal-sourced foods contain high amounts of glutamate, glutamine, aspartate, asparagine, and branched-chain amino acids. Cysteine, glycine, lysine, methionine, proline, threonine, and tryptophan occur in low amounts in plant products relative to animal products. Taurine and creatine are absent from plant sources but present in all animal-sourced foods.
Why it matters
It outlines nutritional differences between plant- and animal-based protein sources, informing balanced diet formulation for humans and cost-effective feed optimization for animal agriculture.
Limits
The abstract provides qualitative generalizations rather than specific quantitative concentrations or statistical comparisons. It is a broad narrative review without explicit systematic search criteria, quality assessment of included analytical studies, or primary clinical data.
Cited by
- supports Taurine is found exclusively in animal foods.