That's hunger from malnutrition or not eating even the lowest amount of daily recommended calories—1,800—while often enduring food insecurity, or not knowing where the next meal is coming from.
The consistently massive population of hungry people—along with variables like severe weather and economic downturns—sometimes spark warnings that the planet faces impending food shortages.
This paradox is nothing new, experts say. It just shows the problem isn't that we have too little food, it's what we do with the food we have.
More than enough food?
"We have two or three times the amount of food right now that is needed to feed the number of people in the world," said Joshua Muldavin, a geography professor at Sarah Lawrence College who focuses on food and agricultural instruction.
"A lot of people aren't analyzing the situation correctly. We can deal with short-term food shortages after a disaster, but fixing long term hunger gets ignored," he said.
"We don't have food shortage problem," said Emelie Peine, a professor of international politics and economy at the University of Puget Sound.
"What we have is a distribution problem and an income problem," Peine said. "People aren't getting the food, ... and even if [they] did, they don't have enough money to buy it."
If there is enough food, a major problem causing scarcity is what we do with it, said Roger Johnson, president of the National Farmers Union, an advocacy group for US farmers.
"Something in the area of up to half of all that's produced is wasted," said Johnson, who runs his own farm in North Dakota.
"In the undeveloped world, the waste happens before the food gets to people, from lack of roads and proper storage facilities, and the food rots," Johnson said. "In the developed world, it's the staggering amount of food that's thrown out after it gets to our plates."
But the world's largest economy— and the richest country on Earth—is not immune from hunger.An estimated one in six people, or some 50 million U.S.citizens, are unable to afford to buy sufficient food to stay healthy, according to the Department of Agriculture. Nearly 17 million are children.
"Our services are needed now more than ever," said Ross Fraser, a spokesman for Feeding America, a nonprofit hunger relief organization. "With so many people out of work, it's not hard to figure out why."
"Many low income seniors use us on regular basis. We serve some three million a year," Fraser said. "They have fixed incomes and with other costs they have like medical bills or just paying the rent, they're often in need of food assistance."
Seniors or anyone else trying to get a handle on food costs are constantly riding a see-saw of inflation.
In 2012, according to the WFO, global food prices rose to near-record levels, rising 6 percent last July alone.
"Food inflation and scarcity go hand in hand," said Mary Lawton Johnson, a food specialist, chef and author based in Palm Beach, Fla.
"Given a natural disaster, food and other items naturally go up in price," she said. "Once that scarcity is gone, food inflation reduces."
Plenty of solutions?
"It is ironic that good or healthier food like apples are more expensive than the food laced with sugars or fats," said Peine. "We need to be more thoughtful on what food we grow."
But the reason for the higher prices is fairly simple, said the National Farmers Union's Johnson.
"Crops like vegetables and fruits are more perishable, so they are more expensive to grow," he said. "Unlike other commodities, they are just less profitable for farmers."
"Many farmers don't make enough to live on each year," Ron Johnson said. "Underdeveloped economies and some global trade are pushing them to the side."
Suggested solutions are just as plentiful.
"We don't need more corn and soybeans, which have become part of the ethanol focus to be energy efficient, and for feeding livestock," Peine said. "What we do need is to produce food to eat rather than industrial commodities."
"We should be using more genetically modified crops that would produce stronger and sturdier crops," Arnolt said.
"We need to move food from where it is to where it isn't and that means investing in agriculture development using the best technologies we have," Arnolt added.
But technology comes with risk, said chef Mary Lawton Johnson.
"I'm not in favor of genetically modified foods to feed a starving world," she said. "The health side effects can be dangerous in my opinion."
"What we need is more localization of food-growing. Let the crops natural to the land grow instead of pushing crops that are not meant to be there," she said.
Food shortage solutions includes taming the investing markets, said Sarah Lawrence's Muldavin.
"The market trading of commodities is overboard and not helping food prices," said Muldavin. "Why does a bushel of wheat have to be traded five times a day?"
"I think we need to step out of the way of the market place and let it take its course," said Tim Richards, a professor of agribusiness at Arizona State University. "We're destroying local food markets around the world by forcing them to buy U.S. commodities."
"We should stop global government support for farmers. The market does a fantastic job of sorting out prices and food production," said Richards. "If we just stay out of the way, food shortages could be eliminated."
Change the food debate
But eradicating world hunger won't be as simple as drought-ending rains or silos full of wheat, said Muldavin.
"A lot of folks have different opinions on how to solve the problem of hunger," he said. "But we have to reframe the debate from food shortages to understanding why so many people are not accessing good, nutritious food."
