Food bills can be a problem for all families, but it seems many of those on the lowest incomes are having to pay a disproportionate amount just to feed themselves.
Research conducted for supermarket giant Morrisons found that 5.2 million households - already defined as living in poverty - spend 15.5% or more of their total weekly outgoings on food and non alcoholic drinks alone. The average UK household spends just 11%.
The research found a four-person family with a household income of £13,000 spends 16% of its total expenditure on food per week. If its expenditure was at the national average level of 11% it would save £14.57 per week. That adds up to £58.28 a month and a whopping £757.64 a year.
The man behind the figures John Glen, Senior Lecturer in Economics at Cranfield School of Management, said: "These findings make for worrying reading.
"In today's stretched financial society, the disproportionate food spend in low income households means that there is simply less money left in the pot for all the other things families need to pay for such as bills, clothing and fuel."
There are some simple steps you can take to reduce your shopping bill, however.
For example, if you go just before the store closes foods like bread and perishables are marked down because they need to be sold that day.
Eating foods that are in season can also help, as they are usually cheaper, and opting for own brand goods instead of big name items can make a big difference.
You can check out more tips on cutting your food bill here.