Claim: Staple food are found in the U.S.

Milk is a pale liquid produced by the mammary glands of mammals . It is the primary source of nutrition for infant mammals -LRB- including humans who breastfeed -RRB- before they are able to digest other types of food . Early-lactation milk contains colostrum , which carries the mother 's antibodies to its young and can reduce the risk of many diseases . It contains many other nutrients including protein and lactose .   As an agricultural product , milk is extracted from non-human mammals during or soon after pregnancy . Dairy farms produced about 730 million tonnes of milk in 2011 , from 260 million dairy cows . India is the world 's largest producer of milk , and is the leading exporter of skimmed milk powder , yet it exports few other milk products . The ever increasing rise in domestic demand for dairy products and a large demand-supply gap could lead to India being a net importer of dairy products in the future . The United States , India , China and Brazil are the world 's largest exporters of milk and milk products . China and Russia were the world 's largest importers of milk and milk products until 2016 when both countries became self-sufficient , contributing to a worldwide glut of milk .   Throughout the world , there are more than six billion consumers of milk and milk products . Over 750 million people live in dairy farming households .