CSIRO research. Net protein contribution

This study makes a number of key points. CSIRO livestock systems scientist Dr Dean Thomas said Australian beef production is efficient at converting both low quality protein in grains that humans can eat, as well as protein in grass that humans can’t eat, into high quality protein for human nutrition.

“Cattle are efficient upcyclers of grass and other feedstuffs not just in terms of the quality of protein they create. They contribute a greater amount of protein to our food system than is used in their production as well,” Dr Thomas said.

https://www.csiro.au/en/news/News-releases/2021/CSIRO-sets-beef-benchmark-for-protein-production

https://www.sciencedirect.com/science/article/pii/S1751731121002354?via%3Dihub