Steps were taken in Canada to reduce the use of Bisphenol A (BPA), a toxic chemical linked to prostate and breast cancer, commonly found in plastics, the lining of food cans, water bottles, and paper receipts. But in many cases, it has been replaced with similar hormone disrupting chemicals, like Bisphenol S (BPS). A new study from McGill University shows that every day Canadians are exposed to BPS in the fresh foods they eat, as chemicals migrate from labels on the packaging materials into the food.
“BPA is a chemical that can interfere with hormones in the human body and cause adverse health outcomes, including cancers, diabetes, and damage to fertility and the development of infants. Now there is growing evidence that BPS may have similar health effects,” says Stéphane Bayen, an Associate Professor in the Department of Food Science and Agricultural Chemistry. “Our study provides evidence, for the first time, that BPS and alternative chemicals found in food labels migrate through packaging materials into the food people eat,” he explains.
The researchers examined an assortment of packaged fresh food sold in Canada such as meats, cheeses, vegetables, and bakery products. They also compared fish bought from stores in Canada and the United States, and the differences between food wrapped with plastic cling wrap films with or without food labels. They found relatively high concentrations of BPS in thermal food labels, like price tags and stickers, where heat is used to print bar codes or unit prices. In contrast, they found little to no BPS in plastic wrapper films, pads, and trays.
While Canada does not currently regulate BPS, the researchers show that the amount of BPS found in the foods studied significantly exceeded the European Union limit, which regulates the permitted amount of substances released from packaging materials in contact with food.
“Considering the number of packaged food items sold with thermal labels, the actual dietary intake of BPS and other chemicals is likely to be high,” says Bayen. The study suggests a more thorough risk assessment of BPS and its ability to migrate into food from packaging is needed to help develop regulatory guidelines in the food sector.
About the study
“Food Thermal Labels are a Source of Dietary Exposure to Bisphenol S and Other Color Developers” by Ziyun Xu, Lei Tian, Lan Liu, Cindy Gates Goodyer, Barbara Hales, and Stéphane Bayen was published in Environmental Science & Technology. This study was supported by a Canadian Institutes of Health Research (CIHR) Institute of Population and Public Health Team Grant and by McGill University.
About McGill University
Founded in Montreal, Quebec, in 1821, McGill University is Canada’s top ranked medical doctoral university. McGill is consistently ranked as one of the top universities, both nationally and internationally. It is a world-renowned institution of higher learning with research activities spanning three campuses, 11 faculties, 13 professional schools, 300 programs of study and over 39,000 students, including more than 10,400 graduate students. McGill attracts students from over 150 countries around the world, its 12,000 international students making up 30% of the student body. Over half of McGill students claim a first language other than English, including approximately 20% of our students who say French is their mother tongue.
