How many people can one year’s worth of livestock feed feed? feed.
About 2,000 pounds of grains must be supplied to livestock in order to produce enough meat and other livestock products to support a person for a year, whereas 400 pounds of grain eaten directly will support a person for a year. Thus, a given quantity of grain eaten directly will feed 5 times as many people as it will if it is eaten indirectly by humans in the form of livestock products…
—M.E. Ensminger, PhD