Livestock Supplies One Third of Global Protein but Most Output Never Crosses a Border

A new global assessment from the Food and Agriculture Organization shows how large the livestock sector is in the food system while also revealing how little of its output is traded internationally. Livestock production supplies about one third of the world's total protein, yet most animal source food remains within domestic and local markets.

FAO reports that only about 15 percent of meat, 12 percent of milk and dairy products and 3 percent of eggs cross international borders. That makes livestock economically global in scale but much more locally distributed than many major crop commodities.

Mixed crop livestock systems and poultry systems each account for roughly 30 percent of the global protein supply from livestock. Pig production systems contribute about 19 percent, grazing systems 12 percent and feedlots about 3 percent.

The report also shows major differences in the structure of animal production. Monogastric animals such as chickens account for 74 percent of annual global meat production, while ruminants provide 26 percent. Cattle supply 81 percent of global milk production.

Animal source food represents an average of 33 percent of protein supply worldwide, but the regional range is wide. FAO says the share exceeds 50 percent in North America, South America, most of Europe, Australia and New Zealand, while it is below 18 percent in Africa.

The economic footprint is also large. The livestock sector accounts for an estimated 40 percent of global agricultural GDP, equivalent to roughly $1.8 trillion. Investment since 2000 has focused increasingly on animal health, productivity, genetics, infrastructure and value chain development.

FAO also documents the environmental and resilience trade offs among production systems. Livestock production accounts for about 12 percent of anthropogenic greenhouse gas emissions, while mixed systems and grazing systems can contribute to resilience and the bioeconomy in ways that differ from intensive systems.

For producers, processors and governments, the most consequential finding may be the combination of scale and localization. Because most animal source food is consumed close to where it is produced, disease outbreaks, feed costs, infrastructure failures and local purchasing power can matter as much as international trade for the functioning of livestock markets.