More than 3,600 chemicals used in food packaging or preparation have been detected in human bodies, some of which are hazardous to health, while little is known about others, a study published on Tuesday said.
Around 100 of these chemicals are considered to be of “high concern” to human health, said lead study author Birgit Geueke from the Food Packaging Forum Foundation, a Zurich-based NGO.
Some of these chemicals are relatively well-studied and have already been found in human bodies, such as PFAS and bisphenol A—both of which are the target of bans.
But little is known about the health effects of others, Geueke told AFP, calling for more research into how chemicals used in packaging end up being swallowed along with food.
The researchers had previously catalogued around 14,000 food contact chemicals (FCCs), which are capable of “migrating” into food from packaging made of plastic, paper, glass, metal or other materials.
They can also come from other parts of the food-making process, such as from conveyer belts or kitchen utensils.
The researchers then searched for these chemicals in existing biomonitoring databases, which track chemicals in human samples.
The team was expecting to find a few hundred FCCs, Geueke said. Instead, they were surprised to find 3,601—a quarter of all the known FCCs.