The price of groceries has gone up 7% in the past four weeks compared to a year ago, leaving people worried about the cost of the weekly shop.
According to Kantar, 22% of households are struggling to make ends meet, with the rising price of the weekly shop a concern for over nine in 10 of these people.
It said that the prices of products such as dog food, savoury snacks and fresh beef are going up the fastest, although they are falling for alcoholic spirits.
Fraser McKevitt, Kantar's head of retail and consumer insight, said people are feeling the squeeze at supermarket tills and they're having to stretch their budgets further to accommodate rising prices.
The research done by YouGov shows that two in five Britons have been forced to reduce or stop spending on clothes, eating out, non-essential food items and takeaways over the last six months.
Inflation is an increase in the price of something over time. If a loaf of bread costs 1 one year and 1.09 the next year, that is an annual inflation rate of 9%.
The headline inflation rate is an average, and prices increase for different goods at different rates. One food industry boss said food prices could rise by up to 15% this year.
Despite these pressures, the UK was still set to splash out on food and drink over the Platinum Jubilee bank holiday weekend, according to Mr McKevitt.
He said that the four-day bank holiday weekend would boost supermarket sales, as people celebrated with friends and families and bought alcohol, soft drinks, barbeque foods and desserts.