The FAO said the double blow of the global recession and high food prices has pushed 100 million people into poverty.
Opposition parties have organized protests in Pakistan. In Egypt, a 50 percent jump in meat prices in recent weeks has helped to fuel demonstrations outside parliament over wages and other economic issues.
"I am afraid that I will wake up one day and not able to get enough bread for my 12-member family," said Aboulella Moussa, a doorman at a Cairo apartment building.
People interviewed in a number of countries said they are coping not just by cutting out expensive items but by eating less - a trend that has stirred concern about malnutrition.
Image: In this April 8, 2010 file photo, soybeans are dumped into a silo storage in Salto, Argentina, some 180 kilometers (112 miles) northwest of Buenos Aires.