Microscopic plastic particles found in food and beverages may affect glucose metabolism and harm organs such as the liver, according to a new animal study.

The findings raise concerns about potential health risks in people who consume microplastics (less than 5 millimetre) and nanoplastics (less than 100 nanometre), which can enter the food chain and end up in seafood and other foods people eat.

Previous estimates show that a person may ingest around 40,000 to 50,000 microplastic particles a year through food and beverages, with some estimating exposure to be as high as 10 million particles per year.