Hunger in America is a little bit different than what some of us are used to seeing in maybe some Third World countries, of a child with a bloated stomach.
About a third of this group carry the bacterium Helicobacter pylori, which makes stomach bleeds three times more likely - and antibiotics eradicate it.
It said over a third of the population regularly suffer from digestive illnesses such as irritable bowel syndrome, constipation, diarrhoea, stomach-aches, nausea and sickness.